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SAE 0W-40 Signature Series 100% Synthetic Motor Oil (AZF)

 SAE 0W-40 Signature Series 100% Synthetic Motor Oil (AZF)
Product Code: AZF • Brand: AMSOIL

The Top Tier of AMSOIL Synthetic Motor Oil. AMSOIL Signature Series Synthetic Motor Oil delivers extraordinary lubrication in all types of automotive gasoline engines. Engineered for enthusiasts seeking maximum protection and performance. Precision-formulated with cutting-edge technology and a longstanding devotion to making the world's best motor oil. The result: engine protection that blows the doors off the highest industry standards.

• 50% more cleaning power vs. AMSOIL OE Motor Oil
• Ideal for turbos & direct injection
• Guaranteed protection for up to 25,000 miles or 1 year

Package sizes include:

Quart Bottle
Gallon Bottle
30-Gallon Drum
55-Gallon Drum

See Pricing or Place an Order
MSDSData Sheet

Product Details

Product Applications

AMSOIL Signature Series Synthetic Motor Oil is excellent for use in all types of gasoline-fueled vehicles. It is recommended for all domestic and foreign vehicles requiring any of the listed performance specifications:

Product Application Specs

• API SN, SM
• Chrysler MS-12633
• Chrysler MS-10850
• Chrysler MS-10725
• Nissan GT-R®

Product Description

AMSOIL Signature Series Synthetic Motor Oil delivers extraordinary lubrication in all types of automotive gasoline engines. By combining industry-premier synthetic technology with AMSOIL premium additives, Signature Series Synthetic Motor Oil exceeds the higher performance demands of modern engines. It withstands the stress of higher horsepower, higher heat and complicated emissions control systems. Signature Series Synthetic Motor Oil is engineered to outperform competitive conventional and synthetic motor oils. It delivers long-lasting performance and protection.

AMSOIL, the leader in automotive synthetic lubrication, produced the World's first API-qualified synthetic motor oil in 1972. Trust the extensive experience of AMSOIL, the First in Synthetics®, to do the best job protecting your engine.

Protects Against Engine Wear

AMSOIL Signature Series Synthetic Motor Oil develops a strong fluid film that keeps metal surfaces separated while its robust anti-wear additives further reduce wear in metal-to-metal contact regions for maximum engine life. The Sequence IVA Engine Test, which must be passed to meet the industry-standard API SN specification, simulates extended periods of stop-and-go driving.

For 100 hours, the test engine cycles between 50 minutes of idling and 10 minutes of elevated rpm - conditions that encourage engine wear. The camshaft is then measured for wear in 84 locations and an average score is determined. We used Signature Series 0W-20, the lightest viscosity in the line, to further increase the severity of the test. AMSOIL Signature Series Synthetic Motor Oil provided 75 percent more engine protection against horsepower loss and wear* than required by the industry standard, extending the life of vital components like pistons and cams.

Cam Lobes Wear Test - AMSOIL SS reduces cam wear
sequence IVA engine test results
*Based on independent testing of AMSOIL Signature Series 0W-20, in ASTM D6891 as required by the API SN specification.

Protects Pistons from Low-Speed Pre-Ignition (LSPI)

We armed Signature Series with an advanced detergent system that protects against harmful deposits and low-speed pre-ignition (LSPI). Most new engines feature gasoline direct injection (GDI), often combined with a turbocharger to boost power and improve fuel economy. These new technologies, when combined with a poorly formulated motor oil, promote LSPI and threaten engine operation. LSPI is the spontaneous ignition of the fuel/air mixture prior to spark-triggered ignition. It occurs in today's advanced engines and is much more destructive than typical pre-ignition.

Original equipment manufacturers (OEMs) like GM* have addressed the issue by designing tests to determine a motor oil's ability to prevent LSPI. The GM test allows up to five LSPI events to receive a passing score. Signature Series Synthetic Motor Oil provided 100 percent protection against LSPI* - zero occurrences were recorded.

LSPI piston damage when competitors motor oil is used

Reduces Engine Wear

Our unique synthetic formulation is inherently stable to resist oxidation and neutralize acids. Signature Series Motor Oil provides outstanding protection against deposits common to high-temperature engine environments. The tremendous heat and stress turbos create can cause some oils to break down and form harmful bearing deposits through a process known as turbo coking. Over time, turbos can suffer reduced performance or fail altogether.

We challenged Signature Series to the GM Turbo Coking Test, which consists of 2000 cycles of extreme heat soaks. An oil must limit the temperature change within the turbocharger to 13 percent or less to pass the test. Signature Series limited the temperature increase to only 3.6 percent, protecting the turbocharger 72 percent better than required* by the GM dexos1® Gen 2 specification.

amsoil turbo bearing shaft protection

Extends Drains: Protection Guaranteed

AMSOIL Signature Series 25,000 miles drain interval technologyAMSOIL Signature Series Synthetic Motor Oil provides reserve protection, allowing you to go longer between oil changes if you choose up to 25,000 miles, 700 hours of operation or one year, whichever comes first*. Our unique synthetic formulation and long-drain additive system are inherently stable to resist oxidation and neutralize acids over longer periods. Signature Series is designed to deliver outstanding engine protection, cleanliness and performance over extended drain intervals - guaranteed. It provides peace of mind so you can fit oil changes into your schedule.

Oil Filter:

Any brand of oil filter may be used with Signature Series Synthetic Motor Oil. For maximum convenience, however, use an AMSOIL Ea® Oil Filter. Made of fully synthetic media with greater filtering efficiency and dirt-holding capacity than conventional filters, Ea Oil Filters are recommended for 25,000 miles/12 months or 15,000 miles/12 months, depending on application, which coincides with Signature Series' once-a-year drain interval. While Signature Series' 12-month service life remains intact if a non-Ea Oil Filter is used, the filter must be changed according to its manufacturer's recommendations.

Trusted by Professional Engine Builders

Engine Masters ChallengeDedicated engine builders and mechanics put in long hours honing their craft. These architects of powerful, high-performance engines turn to Signature Series to protect their passion.

"When we use AMSOIL, I don't worry about a film breakdown or an oil breakdown - and the oil pressure is always consistent. We've tested oils back-to-back on the dyno in our shop and we're always able to make more power with AMSOIL."

-Brett Bowers, Engine Masters Competitor and Professional Engine Builder

Maximum Cleaning Power to Battle Sludge

AMSOIL Signature Series offers Maximum Cleaning Power to Battle SludgeAMSOIL Signature Series Synthetic Motor Oil has 50 percent more detergents* to help keep oil passages clean and promote oil circulation.

Engine failures due to sludge are often caused by a plugged oil pick-up tube screen - the motor is effectively starved of oil. The Sequence VG Engine Test measures an oil's ability to prevent sludge. During the test, a Ford 4.6L engine is subjected to sludge-inducing conditions for 216 hours. The industry standard allows for 10 percent blockage before the motor oil fails the test. Signature Series produced a screen virtually free from sludge (see image). Its detergent and dispersant additives are so effective, Signature Series provides 90 percent better protection against sludge.

• *Based on independent testing of AMSOIL Signature Series 5w-30 motor oil, in the LSPI engine test as required for the GM dexos 1® Gen 2 specification.
• *Based on independent testing of AMSOIL Signature Series 5W-30 in the GM turbo coking test.
• *vs. AMSOIL OE Motor Oil
• *Based on independent testing of AMSOIL Signature Series 5W-30 in the ASTM D6593 engine test for oil screen plugging as required by the API SN specification.
* All trademarked names and images are the property of their respective owners and may be registered marks in some countries. No affiliation or endorsement claim, express or implied, is made by their use. All products advertised here are developed by AMSOIL for use in the applications shown.

Preserves Horsepower

The extreme durability of Signature Series Motor Oil ensures your engine runs stronger, for longer. We installed Signature Series 5W-30 Synthetic Motor Oil in a Ford* F-150 with a new 3.5L Ecoboost engine to test its ability to protect turbocharged direct-injection (TDGI) engines from torque and horsepower loss during extended drain intervals up to 25,000 miles. Power sweeps were done at the beginning and end of the test to evaluate horsepower and torque retention. As the graph shows, Signature Series helped maintain engine performance throughout the 100,000 mile test.

horsepower degradation test results

Limits Oil Consumption

Signature Series has a uniform molecular structure that limits evaporation and keeps it where it's needed most - protecting your engine. Volatility (burn-off) occurs when oil gets hot, causing lighter molecules to burn off or evaporate. This leads to oil thickening, additive imbalance, higher emissions and oil consumption. The NOACK Volatility test is the industry standard for evaluating motor oil high temperature evaporation. It measures the percentage of burn-off after a motor oil is placed under constant airflow at 482°F for 1 hour. A lower number indicates a better resistance to evaporation. Signature Series falls far below the API limit for volatility, reducing the need for frequent oil top-offs and limiting vehicle emissions.

noack volatility test results

Easier Cold-Starts

Signature Series Synthetic Motor Oil does not contain paraffins (wax) and stays fluid in temperatures of -58°F and lower. Extreme cold causes other motor oils to thicken, starving vital moving parts of lubrication, accelerating wear and even preventing vehicles from starting. Signature Series provides 66 percent better cold-temperature performance for easier starting, better fuel economy, improved oil flow (as seen below) and reduced wear.

pour point test results

Maintains Protective Viscosity

We formulated Signature Series with superior thermal durability that resists breakdown better than conventional and synthetic motor oils. The Sequence IIIH Test uses the Chrysler 3.6L Pentastar engine to evaluate a motor oil's ability to resist the damaging effects of heat. The test is conducted with oil temperatures of 304°F, 100°F hotter than normal operation, to accelerate oil thickening and deposits. Despite the extreme conditions, Signature Series kept pistons clean and held thickening to only 6 percent, a minimal amount compared to the proposed specification limit of 150 percent*. This stay-in-grade performance helps maintain maximum power and fuel economy while also ensuring advanced technologies like variable valve timing (VVT) operate as designed throughout the entire drain interval.

sequence III-H test results

• *Based on proposed ILSAC GF-5 Plus specification.
*All trademarked names and images are the property of their respective owners and may be registered marks in some countries. No affiliation or endorsement claim, express or implied, is made by their use. All products advertised here are developed by AMSOIL for use in the applications shown.

SERVICE LIFE

Normal Service: Up to 25,000 miles, 700 hours of operation or one year, whichever comes first, in personal vehicles not operat-ing under severe service.

Severe Service: Up to 15,000 miles, 700 hours of operation or one year, whichever comes first. Severe service conditions include commercial or fleet vehicles; excessive idling; or frequenttowing, hauling, plowing or driving in dusty conditions.
• Modified engines (non-stock), racing vehicles and vehicles using alternative fuels (E85, CNG, propane, etc.) are excluded from extended drain interval recommendations.
• Change at the vehicle manufacturer's recommended drain interval outside U.S. and Canada.
• AMSOIL Ea® Full-Flow Oil Filters are designed for extended drain intervals. Do not exceed 12,000 miles or one year with other brand filters unless longer intervals are recommended by the vehicle manufacturer. Always change filter when changing oil.
• Check oil regularly to maintain proper fill levels.

AMSOIL Ea Full-Flow Oil Filters stop smaller particles, flow more oil and last longer than regular filters. For best performance, use AMSOIL Ea Full-Flow Oil Filters.

COMPATIBILITY

AMSOIL Signature Series Synthetic Motor Oil is compatiblewith other conventional and synthetic motor oils. Mixing other oils with AMSOIL motor oils, however, will shorten the oil's life expectancy and reduce its performance benefits. AMSOIL does not support extended drain intervals where oils have been mixed.

Aftermarket oil additives are not recommended for use with AMSOIL synthetic motor oils.

HEALTH & SAFETY

This product is not expected to cause health concerns when used for the intended application and according to the recommendations in the Material Safety Data Sheet (MSDS).

Click here to view the MSDS Data Sheet for AMSOIL AZF.

Keep out of the reach of children. Don't pollute. Return used oil to collection centers.

Technical Data

TYPICAL TECHNICAL PROPERTIES
AMSOIL Signature Series Synthetic 0W-40 Motor Oil (AZF)
Kinematic Viscosity @ 100°C, cSt (ASTM D445)14.8
Kinematic Viscosity @ 40°C, cSt (ASTM D445)84.6
Viscosity Index (ASTM D2270)184
CCS Viscosity, cP @ (°C) (ASTM D52936062 (-35)
Flash Point °C (°F) (ASTM D92)222 (431)
Fire Point °C (°F) (ASTM D92)238 (460)
Pour Point °C (°F) (ASTM D97)-50 (-58)
NOACK Volatility, % weight loss (g/100g) (ASTM D5800)7.7
High Temperature/High Shear Viscosity
@ 150°C, 1.0 X 106 s.-1), cP (ASTM D5481)
3.76
Total Base Number (ASTM D2896)12.5

Related Videos

LSPI Super Knock Prevention

Sequence IIIG Engine Test + Motor Oil Comparison

Cold Flow Pour Test AMSOIL vs Conventional Motor Oil


 SAE 0W-40 Signature Series 100% Synthetic Motor Oil (AZF)

Did this product meet your expectations?

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Product Name: SAE 0W-40 Signature Series 100% Synthetic Motor Oil (AZF)
Current Rating: 4.97out of 5 stars
Votes & Reviews: 50 vote(s) and 157 user reviews.


A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by JD: space

Really wonderful oil

Started using the Signature Oils last year. I can tell the difference from regular synthetic oil. In the long run it's probably less expensive to use the Signature because of more then double the change interval.

Item Reviewed: Signature Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Mike: space

Good stuff

You can't beat Amsoil, and at the price when you become a preferred member, the price is as good or better than most other oils.

Item Reviewed: Signature Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Josh: space

One of the best I have ever used

Amsoil products are constantly the highest quality and the best protection for all my vehicles. It has revived and made my daily driver (over 20 year old vehicle) run like a top. It is the prefect addition to any vehicle that you want to get long use out of, and regardless of the environment have the best protection for your engine.

Item Reviewed: Signature Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Pepe: space

Started using it......will never stop!!! Whatever I drive!!!

Always heard about it in the past, but never tried it. Finally tried it and will always use it!!!

Item Reviewed: Signature Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Gutsi: space

Best Oil

I've been using Amsoil in all my cars (6) for over 10 years. My 07 Honda Fit just turned 400k miles and is going strong, along with all my other cars running Amsoil. And I save money by only having to change the oil every 15k miles. Excellent product that actually saves me money in the long run.

Item Reviewed: Signature Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Mk: space

Love this stuff!!!

I drive 150 miles daily and amsoil helps my engine run smooth and cool.. Even when I'm due to change it feels like oil not syrup... Great price for a great product.. would buy amsoil again and again.. Thanks amsoil

Item Reviewed: Signature Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Tony: space

5/50 Signature OIl

Have previously trid various oils in my 2012 Boss 302 & Amsoil 5/50 is been my choice since it came out .Great Stuff''''''

Item Reviewed: Signature Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Ken: space

Signature 5-30 and 5-20 and 100:1 2 cycle oil

I installed 5-30 Sig in my Tahoe last May. Through this May I completed 10,000 miles including through a winter here in Northern Michigan. The shop I use was touting another oil and warned me that no oil could be used all winter in multiple cold or very cold start conditions and last through the whole winter. Well, I had the oil tested after a year and even in this harsh environment, the oil still had 3,000 to 5,000 miles of life left. Kudos to the product. Yes the Tahoe does use some oil--maybe 3 quarts total over that period, but it did amaze me that the oil held up and was still good after a year. Fuel economy on a road trip to Rochester, MN with a change of trans fluid to Amsoil synthetic showed an increase in mileage from about 19 to a solid 21-22 MPG. Fluids are the only change and this vehicle is otherwise a gas hog.

Item Reviewed: Signature Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Short Circuit: space

Use it believe in it

I have used this product for over 20 years. I have actually torn down an engine (oil pump shaft broke) that I used this oil in close to its whole life and the internals of the engine were remarkable. They showed very little wear and tear and none of the typical deposits you would see in an engine with 135,000 miles on. I know there is a lot of churn about who's best and so on but speaking for this oil it's worth every penny. Your buying peace of mind.

Item Reviewed: Signature Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Jerry: space

Yes

Good product

Item Reviewed: Signature Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Pgf1: space

I will be buying this product again

I have recently changed to this after considerable research,

Item Reviewed: Signature Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Lee: space

I am not going to stop using this product

Since I start using Amsoil signature zero 20 100% synthetic oil on my truck start ups Are much quicker and Engine runs more smoother and more power.My gas mileage has improved significantly

Item Reviewed: Signature Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Ed: space

Great product

Start using AMS oil 10 years ago. After 250,000 miles car is still running great.

Item Reviewed: Signature Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Theron: space

Reputation

Lots of confidence

Item Reviewed: Signature Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Don the mechanic: space

I would buy this product again

This Product saves money. It gives you great protection for your engine over a longer period of time, so you do not have to change it as often.When used with the Amsoil Ea Oil filter, it does even a better job. So in the long run it is more economical to use.

Item Reviewed: Signature Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by ED: space

Long intervals

As I have gotten older I like how I now only have to change the oil only once a year. I take care of 6 cars (mine and my kids) so this really helps me do other things besides changing oil.

Item Reviewed: Signature Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by John: space

I would buy this again

Long life offered

Item Reviewed: Signature Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Lambshark: space

The only oil I use.

Been using Amsoil for years with awesome success. I always use their oil filters as well.

Item Reviewed: Signature Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Harvdog: space

We are extremely happy with Amsoil

We love the oil , filters and grease. Currently we have just over 411,000 miles on our 2004 Honda Element. Thanks for providing such a high quality lubricant.

Item Reviewed: Signature Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Tito: space

Excellent Product

I use this product in my vehicles that specify 0W-20. Since switching, the engines are much quieter and seem to run cooler.

Item Reviewed: Signature Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Mike: space

Still going strong

I've been using Amsoil Signature Series in my 2010 Toyota truck exclusively. Eight years later and 200,000 km later it still runs like new. I wouldn't think of using anything else.

Item Reviewed: Signature Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Satisfied: space

Cured Generator Oil Consumption

Great for my new air-cooled Generac 11kW automatic backup generator. It was consuming another well-known brand of synthetic 5w-30EP oil at an unacceptably excessive rate. After researching the various oil properties and what others with air-cooled generators down in hurricane country use, I decided to try Amsoil 5w-50. After switching my oil consumption completely stopped. I use it or Amsoil 0W-40 in all my small engines now.

Item Reviewed: Signature Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by David: space

I would buy this product again

Amazing product so good im happy i made the right Choice

Item Reviewed: Signature Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by PJ: space

I would buy this again

I started using this about a year ago and now have in my two motorcycles, my fiancés bike and a couple of friends.

Item Reviewed: Signature Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by CJ: space

I will purchase again

The Amsoil Products not only protect my vehichle to the highest standards,they save me time and money.

Item Reviewed: Signature Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Jeff: space

Great Product and Service

We have used Amsoil products in all of our vehicles for the past 8 years. The engine in our 2010 Equinox is still running strong with 155,000 Amsoil miles. We have used the Signature Series 5W-30 for the past 75 of so and even with the high mileage we lose almost no oil between changes. We do change at about 12K to 15K though due to the heat in the summers of central Virginia.

Item Reviewed: Signature Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Gary B: space

I would buy this over and over again.

I use this in all for vehicles I own for the last 20 years. My V10 Motor Home, my Hemi SUV, my V-6 convertible beach cruiser and my classic convertible street rod. Extremely versatile and has never let me down.

Item Reviewed: Signature Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Anson: space

Top oil, over every other on the market.

I've been using amsoil 35 years, I believe it's what gave me 450000 miles on on a 77 Porsche. Today I used it in my 18 Kia soul turbo and 16 Kia turbo koup, read the specs it's the best oil for any application.

Item Reviewed: Signature Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by BATMAN: space

OIL

This is the only oil I use in all of my vehicles.

Item Reviewed: Signature Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Scott: space

Amsoil is good stuff!

My engine has 245,000 miles on it, (second engine in the car) and I have used Amsoil for about 2 years. I recently had an oil analysis by Blackstone Labs, and they told me that the wear I had represented about 5,800 miles, but I had actually 22,600 miles on that oil change!! I could have run until 25,000 miles, so next time I will.

Item Reviewed: Signature Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by TDR: space

Only oil period.

Use this in my 2017 Kia 3.3 and like that I save money with my longer oil change interval.

Item Reviewed: Signature Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Mike: space

My F150 and Highlander both run with Amsoil Signature

My vehicles never run better. I like the convenience of changing my oil once a year.

Item Reviewed: Signature Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Ed: space

Best oil

I have been in the automotive industry for 45 years and have seen all kinds of oil and lubricants. Many claim amazing things. My personal experience with Amsoil has been long term. First my race bike. Nothing compared to the performance of Amsoil. Runs cooler, lasts longer, overall good results. My truck now has 343000 miles. Still does not use any oil. My Harley picked up 3 miles/gallon and runs cooler.

Item Reviewed: Signature Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Tommy: space

Gets the job done

Great product

Item Reviewed: Signature Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Tone Capone: space

Love Amsoil

Amsoil is the only well we use in our cars. Are even got my family and some of my friends to switch

Item Reviewed: Signature Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Loop: space

Long time user

Great oil

Item Reviewed: Signature Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Dave: space

Great Stuff. Highly Recommended. Awesome performance

Here in Edmonton, Alberta. We've got crazy And confusing weather. The cold gets up to -50 So this Oil does Absolutely great performance. You've gotta have this in coldest weather.

Item Reviewed: Signature Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Corvette Mike: space

Will continue to be a customer

Just recently changed my C6 Corvette to Amsoil. Looking for cooler operating temps and the reduction of lifter noise on cold starts. Took a 200 mile trip ran about the same temps as my previous synthetic oil. Engine seems a little quieter with cold starts. The cruising season is just getting started her in Ohio. The true test will be when I track the car at some of our clubs autocross races and high speed events. Two other friends have witnessed improvements with this product and switched based on their recommendations. They both race frequently and push their Vettes to the limit without any issues.

Item Reviewed: Signature Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by juicey j: space

delivery service

seems to be working good. I put a 100,000 miles a year on. does not keep engine as clean as redline. lots of varnish from amsoil at the 100,000 mile mark. redline at a 100,000 looks just like knew inside the engine.

Item Reviewed: Signature Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Larry: space

Yes

I started using this oil many years ago. When first bought it I used your oil filter and oil I put in my Ford 150 pickup truck 2002. I left in my truck for 6 weeks and drained the OIl and put in new filter and oil this cleaned the inside of my motor now the oil stays very clean. I now have over 363,000 miles on my truck still running strong

Item Reviewed: Signature Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by windom: space

again and again

Amsoil oil is amazing. You are the best.

Item Reviewed: Signature Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Nosocs: space

Shmoov...

I use in a 1999 Acura CL/3.0 coupe...starteed @ 40,000, and have used for last 180,000...car has 220,000, and runs as shmooov as any vehicle out there....@ 185,000, I changed the transmission fluid, using AMSOIL transmission fluid...aGain.....shmoove shifting....Best product for any vehicle!

Item Reviewed: Signature Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Jake: space

I have only ever used this in my truck.

Best synthetic on the market. It's the only thing I use in my truck.

Item Reviewed: Signature Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Serge: space

Great oil as always.

As always, AMSOil didn't disappoint. Ordered this for my mom's 2016 Honda Accord.

Item Reviewed: Signature Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Jose the big burrito: space

It's amazing oil

Super impressed with all The Amsoil products. Extebdes oil change intervals makes it a no-brainer.
vehicle
Vehicle runs so much smoother, better gas mileage, it's a win-win

Item Reviewed: Signature Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Tony: space

I would buy again

Use for my car

Item Reviewed: Signature Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Mel: space

I run this oil in all engines I own..

I always say that if Amsoil don't know how to make Synthetic Oil NO ONE does..
Because they have been the first since 1972..

Item Reviewed: Signature Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by rdj519: space

1999 z71 truck

300000 miles with once a year oil change. Amsol is the best

Item Reviewed: Signature Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by ...: space

...

Great products

Item Reviewed: Signature Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Rusty: space

Very good product!

I use Amsoil in everything machine I own. That Amounts to one diesel pickup to three gas pic up and two mustangs one being a 2011 Shelby GT500

Item Reviewed: Signature Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Dennis Oldblood: space

Best product ever for use in your car

Amsoil protect my crankshaft when my oil pump failed and I get better gas milage, epa rating for my car is 35 mpg and I repeatedly hit 40 mpg.

Item Reviewed: Signature Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Chris: space

Good Stuff...period

2010 Toyota sequioa w/ 200k on the clock.
Doubled oil change interval to 10k, doesn't use a drop between changes. Frequently idle and tow in hot Mississippi weather. Noticeably quieter valve operation over other top shelf synthetics. I just did a 200k service and noticed there is zero sludge in the engine. It was as sparkly as a transmission.
I expect 300-400k out of this engine but it is a Toyota not a Ford!

Item Reviewed: Signature Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Los: space

Great Oil

The best oil I've ever used.! Hands down!

Item Reviewed: Signature Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Poncho pete: space

5w20 signature oil

2013 Kia Rio o my has a 3.5 qt capacity. Best oil I've seen for this scenario

Item Reviewed: Signature Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Tim: space

Love Amsoil

Only Oil I will every use on my high performance cars

Item Reviewed: Signature Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Chance: space

I would definitely buy again.

Used for engines and trans. I researched oil products IE: Royal Purple, Mobil 1, and Amsoil. Amsoil won.

Item Reviewed: Signature Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Brian: space

Yes

On thanks

Item Reviewed: Signature Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Rob: space

Subaru calls for this Wt oil

My new Outback calls for 0-20 oil. This is a difficult thing to believe in considering I am old sckool and would rather have a heavier oil in the motor.
So if I am going to put thin oil in this new car, then I want the best I can get.
I been using AmsOil products for a while now and have no complaints .

Item Reviewed: Signature Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Ryan: space

My new favorite oil!

My 302 race engine loves it! My old oil would barely last 1,500 miles but signature series is still golden after 5k! Thinging about swithing everything i have to it and see how a stock engine does up to 15,000!

Item Reviewed: Signature Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Hawk: space

The only oil I will use.

The best oil I have ever used and I tell everyone I know.

Item Reviewed: Signature Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Dan the man: space

That's the one for my car

For the long mileage & city

Item Reviewed: Signature Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Joe: space

This oil is some awesome stuff.

Unlike other oils I have tried in the past this stuff seems to work very well in my 5.3 liter vortex, she runs much quieter and cooler then before, I was a big a mobile 1 user before trying the amsoil and I've been using it ever since.

If you rilly listen to you engine it will tell you what it likes, while that may sound crazy to some people to me this stuff is definitely approved by my motor lol. It is good stuff a bit pricey but you will get what you pay for with this product there's no dought kn my mind.

Item Reviewed: Signature Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Jim: space

Good for another year

I bought SS 5W-30 and a 15K filter for less than 4 oil changes

Item Reviewed: Signature Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by B: space

Simply the best stuff ever

Amazing products. Will not run anything else in my vehicles, atvs, snowmobiles.

Item Reviewed: Signature Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by DonV: space

BillV

When changing oil in a turbo engine the new formula Amsoil Signature series is a no-brainer!!

Item Reviewed: Signature Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by 392 SRT: space

Best EVER!! BAR NONE

I was introduced to AMSOIL in 1989 and ever since then it's all I use. I've had dealerships and Auto parts houses try to sell me Royal Purple and Penzoil and Mobil One and I stop them before they even get going good. And I tell them, "Sorry that you like trashy oil in your prized possessions but as for me I only run the best, and that's Amsoil. It's been around since the 60's and it's never failed. So, why not use something that stands the test of TIME!!? That's why I use it, I "Know" it won't fail."

Item Reviewed: Signature Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Oldfogey: space

using amsoil for over 20 years.

Run it in every vehicle I own and my kids. Best product on the market

Item Reviewed: Signature Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Larzman: space

AMS oil signature 10W-30

Product is terrific. Improved engine idling & gas mileage. Good engine wear too! Shooting for 300k & beyond!

Item Reviewed: Signature Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by mike: space

So far so good

Time in between changes

Item Reviewed: Signature Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by H.d. Hood Jr.: space

Great stuff !!!!!! I only use amsoil

Works great lasts a long time !!!! Over priced though

Item Reviewed: Signature Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Ironrail: space

I won't use any other oil

We have a 2016 Honda Pilot and a 2014 Jeep Gtand Cherokee. The Pilot gets 28 mpg and the Jeep gets 24. I truelly believe it's because of AMSOIL. When we picked up my wife's Pilot from the dealer I told her that within 30 days i'll have it running so smooth that she won't know that it's running. She gave me the bonehead look. Long story short, both vehicles run as smooth as silk and the mpg's are higher since AMSOIL. Not long ago i got into her truck and i didn't know it was running. I asked her if she was going to start the truck before we leave for our trip. That's basically how the story goes for all of our cars; lawn equipment and anything that uses oil. It's the best you can get.

Item Reviewed: Signature Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Kyle: space

Yes

My vehicles definitely feels it has more performance.

Item Reviewed: Signature Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Jeff: space

Amsoil 5w30

Use in my Toyota Tundra since new 2006! 270,000 mi. Great protection, runs well & very consistent!

Item Reviewed: Signature Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Andy: space

Excellant oil.

Use it in my 2000 Honda civic SI with 220000 miles on it. Still runs like a champ.

Item Reviewed: Signature Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Bill: space

Mmmmm gooo

It's the best

Item Reviewed: Signature Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Shawn and Patricia: space

Great product

Best synthetic oil in the world it's the best and only oil we use.

Item Reviewed: Signature Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Dale: space

Great Product

This product is awesome, since I do not put many miles on my vehicles, with getting a Demo from work, it is nice to only have to change the oil in all of my vehicles once a year and know that it comes out as clean as new when I drain it! Superior product and highly recommend!

Item Reviewed: Signature Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Coulee: space

Signature Series 5w-40

Great oil, change it once a year. Been buying Amsoil since 1980, first as just a customer and then as preferred. I use only Amsoil oils, gear oils in tractor, small engines.

Item Reviewed: Signature Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Clint: space

5w-30

Awesome oil! After changing the oil in my wife traverse to Amsoil everything has been running smoother. The only down side is sometimes my wife will start the car waiting for me to leave the house, I'll get in the car and try and crank it again because I cant hear the engine running it's so quiet now.

Item Reviewed: Signature Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Mark: space

I've been with AMSOIL since 1988

I use it in my 2 wheel drive 4Runner and have 273,000 miles on the car all with AMSOIL.

Item Reviewed: Signature Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by George: space

Awesome oil

Amazing oil for the Toyota FJ. FJ ran better and oil at change interval didn't seem as dark.

Item Reviewed: Signature Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Nathan: space

I buy this product every year

Have been using in my last 3 vehicles

Item Reviewed: Signature Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Imy: space

Even better than I thought

Works as designed; and extends oil changes intervals

Item Reviewed: Signature Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Imy: space

Worked as designed

Gain in mpg and more miles/time before maintenance intervals

Item Reviewed: Signature Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Maiden Youesa: space

Get the quality your $$$ deserves Amsoil

I just changed the oil in both my rides and loves the quiet smooth sound when running my signature series.

Item Reviewed: Signature Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Kevhead: space

I will not consider any other synthetic than the BEST.

I started using amzoil products before being called amsoil. I use the signature series oil and Eo and Eat filters. I change my oil once/yr. And I literally do not burn any oil in that yr. With my 00' tundra V8 using amsoil. My 02

Item Reviewed: Signature Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by workamper: space

Run with this oil for 30 plus years

Nothing on the market that beats it

Item Reviewed: Signature Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Rick: space

I will buy this product again and again

This is the only kind of oil that I will use in my vehicles

Item Reviewed: Signature Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Drew: space

I would buy this product and use it in every car I own

I own 2003 s2000 that I recently rebuilt the cylinder head on. Prior to the rebuild the car was turboed for a decent amount of time. The car currently sits around 112k miles at the moment after the rebuild. The car has been running Amsoil signature series for most of its life. When I inspected the camshaft, cylinder walls, etc during the rebuild the car showed absolutely no sign of wear anywhere and this is after being turboed and ran hard for a decent amount of time. I moved back to 10w30 signature series after the rebuild but still great stuff.

Item Reviewed: Signature Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Shimmy: space

ONLY Amsoil!

I've taken several engines apart but only engines that have run Amsoil and they only need coolant system work. Conventional oil precipitates out garbage and sludges up engines resulting in CLOGGED oil passages. If your switching from conventional, get the best protection you can get that has tons of positive history. Do your homework/research to understand ALL the costs involved. You will determine Amsoil is the best switch you can make for your vehicles.

Item Reviewed: Signature Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Railrunner: space

A Trusted Product

I have been using Amsoil products in my vehicles and motorized equipment for many years and relay on its quality. As a "gearhead", I know how important using quality motor oils and greases are to machinery. They are my first choice for lubrication fluids.

Item Reviewed: Signature Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by K-Mac: space

Only the BEST Oils for my vehicles

I only use American AMSOIL in all my vehicles. For this one, I use it in my 2005 Honda Fit 1500cc..

Item Reviewed: Signature Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by K-Mac: space

Only American

I only use American AMSOIL in all my vehicles. For this one, I use it in my 2016 Nissan Caravan NV350.

Item Reviewed: Signature Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Jeff: space

Great product

I run Amsoil oil and filter in my Yukon Denali 15,000 miles between changes. Just reset the change oil message at 7500. Doing this for years with several GMC Yukon's. At 250,000 plus miles no oil burn at all. Very impressed with not having to go under the car twice as much.

Item Reviewed: Signature Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Ricky: space

Best oil you can buy

Awesome cold start protection, and anti-wear lube, simply the best

Item Reviewed: Signature Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Mustang Larry: space

Buy again

So far all is good.

Item Reviewed: Signature Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Mustang Larry: space

I will buy this product again.

Why is it when I change my oil does my mileage drop by 2mpg. For the first 400 miles 1 1/2 to 2 mpg less then it creeps back up.

Item Reviewed: Signature Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Ron the Tyrolian: space

Great products

I have relied on Amsoil products for years to protect my engines and it has done exactly that.

Item Reviewed: Signature Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by SamLac: space

Why change?

I started using AMSoil in the mid 80s while in Alaska. Cold extreme make lubrication very critical. At minus 40, most petroleum lubes won't even drip off the dip stick and when started cold you can hear every bearing in the engine as there is little or no lube flowing. No so with my AMSoil.

Item Reviewed: Signature Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Jeff: space

Not worth it.

I've been running 5W30 Signature Series in my 2002 Tacoma since putting it on the road in 2016 with 116,000 miles on the engine. I have since had Oil Analyzers (Amsoil, Inc.) test three samples from the truck so far, and have yet to have the oil last more than 13K miles before being told it's time for it to be changed. So much for the 25,000 miles/1 year claim...

Item Reviewed: Signature Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Grizz: space

This stuff is THE BEST!

I have 2 vehicles that have had this oil in them (changed every 15,000mi) since I bought them new. They both have mileage approaching 250,000, and they run like BRAND NEW. My newest vehicle is a 2017 Subie Forester Turbo so it gets Signature 5W-30 every 10,000 miles, and I'm sure it will see 200k and beyond.

Item Reviewed: Signature Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by GF1563: space

Great product, well worth the money

Love the extended oil change intervals and my fuel mileage increased slightly, which leads me to believe it must be lubricating everything very well.

Item Reviewed: Signature Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Pat: space

This is the only oil I will put in my engine

It's great year round hot or cold

Item Reviewed: Signature Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Don: space

Will Always use Amsoil

Several years ago I switched to Amsoil in my GMC Yukon. I was very impressed with what the Signature Series 5w-30 Motor Oil looked like after the first oil change. With all the oils and products that Amsoil offers, I have since switched everything I own over to Amsoil. Even my lawnmowers.

Item Reviewed: Signature Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by dhgguy: space

I can recommend this product

Used in my F150 exclusively. Excellent oil & filter.
Would not use anything else.

Item Reviewed: Signature Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Ronv: space

Great product!

I have used Amsoil for 30 years and wouldn't think of using any other oil.

Item Reviewed: Signature Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Mister nice: space

Yes

Love that you don't have to change oil as offer as regular oil. Is is a little high. Hey but you get what you pay for.

Item Reviewed: Signature Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Henry: space

Good stuff

I use Amsoil exclusively

Item Reviewed: Signature Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Jblev77: space

The best synthetic oil

#1 for 3.5L ecoboost

Item Reviewed: Signature Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Ed: space

This is the only oil I run in my Silverado Cobalt, and GTO

I like being about to change oil at any time between 5-10k and not have to worry about weather or not the oil is doing it job !!!

Item Reviewed: Signature Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by RebelnOhio: space

Amsoil always works!

I have been using Amsoil for over 15 years and have never had a problem, it's a well proven product that I trust in all of my cars for work and for pleasure. I will will continue to use Amsoil and benefit from it's proven results! I own a Livery/Limo Service and I drive about 40-50K miles a year on various cars and I believe Amsoil is the best Oil for all of my vehicles. With the long 15k Mile change intervals it is a money saving gem and your engine benefits 100%. I recommend there products highly!

Item Reviewed: Signature Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by KENT: space

SIGNATURE SERIES SYNTHETIC MOTOR OIL

I've used this brand and series in my Dodge Ram 4.7 v-8 since I acquired it at 90,000 miles. I've driven another 70,000 miles since and the engine is stronger than it's ever been! I expect to drive this truck until at least 300K miles because of the Amsoil Signagture Series Synthetic brand motor oil. I won't use anything else!

Item Reviewed: Signature Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by KK: space

Great Stuff

I use Amsoil on my SUV and love it!

Item Reviewed: Signature Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Tom: space

Great Oil

I use ansoil on all of my trucks, motorcycles, ATVs. This oil I use on 2017 Hemi 2500. It cannot be beat.

Item Reviewed: Signature Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by G: space

I love it

Instant satisfaction, after the first start up i could already hear and feel things running smoother.

Item Reviewed: Signature Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Redtundra8: space

Great Oil

This is the best oil money can buy in my opinion. I use this in all my vehicles and have for the last 12 years. Love only having to change the oil once a year. I highly recommend this product.

Item Reviewed: Signature Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Pat: space

Best line out there

Bestboil products on the market by far. I run it in all my vehicles

Item Reviewed: Signature Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Billy G: space

No issues

I have used Amsoil products for many years in all of my vehicles and small engines. I have never had an issues. I recommend Amsoil even though it is not the cheapest but the delivery is very prompt.

Item Reviewed: Signature Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Wingsprnt: space

Does what it promises.

Not sure about the oW-20 weight here in Florida, but that is what Honda calls for.

Item Reviewed: Signature Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Greg: space

Good product

Always met my expectations.

Item Reviewed: Signature Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by MatsB: space

Excellent products.

Using Amsoil in all of my family's cars. Using Signature series in cars that drive over 12,000 miles per year, and XL series in cars that drive less than 12,000 miles.
Sent a 27,000 mile sample for testing to a independent lab, and they recommended 30,000 miles next time based on the excellent results.
Also using Amsoil in all lawn equipment and for a standby generator.

Item Reviewed: Signature Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Robert Long: space

I would definitely buy this product again

Great product gives better fuel mileage and cleaner oil after changes

Item Reviewed: Signature Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Tim: space

The Best There Is

I've been using Amsoil since the 1980s in everything with an engine. And have bragged about it's benefits to anyone who'd listen.

Item Reviewed: Signature Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Rob: space

Increase mileage

I get better mileage with Amsoil
I run my 4x4 very hard and Amsoil is doing a great job of keeping it running strong

Item Reviewed: Signature Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Elvis of Aragorn: space

Great results

My 2004 Silverado (5.3L V8) has had a steady diet of Amsoil since its second oil change. I have stuck to the 10,000 mile interval, using Amsoil Ea filters & Signature Oil. She's about to roll over the 200,000 mile mark, and I have had no engine issues. I use Amsoil Signature Synthetic Oil in all of my vehicles, and plan on keeping it that way.

Item Reviewed: Signature Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Pinto: space

great in the city

I'm city driving in a 4x4 Ford van and after my last oil change the oil was still in great condition after 15,000 miles. just used the cleaning solution so lets see how this improves engine longevity. really happy with all th products I have received.

Item Reviewed: Signature Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by S2kadi: space

The Only Oil I Trust

I use Amsoil Signature Series in both of my cars that are susceptible to burning oil. The 10W30 goes into my Honda S2000 and works great! Amsoil is the only oil I use in my motors and gearboxes, after trying out several different brands, I have found their quality to be of the best.

Item Reviewed: Signature Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by pro4100: space

Top Notch

I use it in my Subie Forester and my silverado 1500. no problems ever!

Item Reviewed: Signature Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Quick charge water: space

Best stuff on the market

Yeah like to 25,000 my old changed

Item Reviewed: Signature Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Beast: space

10K Oil Changes

I will never use conventional again. 10K mile Oil changes, or once a year. You cant beat the quality and value of this product. No dealer or mechanic can ever persuade my to change every 3k miles again!. Get you some!

Item Reviewed: Signature Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by ScoobyVTEC: space

Improved MPG

Bought Amsoil for all of my cars so I wouldn't have to change the oil so frequently and for the protection it gives all of the internal moving parts. I've noticed an increase in MPG and smoothness when I drive.
2017 Civic Type R
2012 Pilot Touring AWD
1998 Civic EX

Item Reviewed: Signature Series Motor Oils
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by S & S Performance: space

Great product

Some of the best oil I have ever used. I tow a 10k lb trailer and oil temps even in dead of summer stay very low. Would definitely recommend to anyone.

Item Reviewed: SAE 0W-40 Signature Series 100% Synthetic Motor Oil (AZF)
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by S & S Performance: space

Great product

Some of the best oil I have ever used. I tow a 10k lb trailer and oil temps even in dead of summer stay very low. Would definitely recommend to anyone.

Item Reviewed: SAE 0W-40 Signature Series 100% Synthetic Motor Oil (AZF)
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Joseph: space

Only the best

Just built a blown LS 383 stroker for my 05 sierra. I have used other synthetics in the past, my builder recommended amsoil and i took his advice. Also use in my 70 nova SS with a stroker 496

Item Reviewed: SAE 0W-40 Signature Series 100% Synthetic Motor Oil (AZF)
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Iowa Veteran: space

Ram 2500 6.4 Beast

No complaints on the product although a free hat for my 2nd or 3rd review of AMSOIL products would be nice. (Not so subtle hint) Lol. I will say that packaging and delivery of seven quart bottles is always well done and delivered in a timely manner.

Keep up the good work.

Item Reviewed: SAE 0W-40 Signature Series 100% Synthetic Motor Oil (AZF)
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Curt: space

Always on the road

I like this product because we're always on the road and we need a heavy duty oil to withstand the punishment that we put it through in our trucks.

Item Reviewed: SAE 0W-40 Signature Series 100% Synthetic Motor Oil (AZF)
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Dan: space

Peace of Mind

I've used Amsoil in my vehicles for many years now. Filters also. I feel it's the best for my vehicles and that gives me peace of mind.

Item Reviewed: SAE 0W-40 Signature Series 100% Synthetic Motor Oil (AZF)
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Carl: space

Best oil ever

I have used amsoil on my jeep srt8 2006 for 10 years. I have never had engine issues and I change my oil every 15,000 miles. If you need a good dependable oil for your performance vehicle, 0w-40 is the way to go.

Item Reviewed: SAE 0W-40 Signature Series 100% Synthetic Motor Oil (AZF)
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by David: space

I would buy again

I use this oil in ram 6.4 hemi I town a 25ft snowmobile trailer and 30ft travel trailer and I have had no problems. I have never had to add oil between changes.

Item Reviewed: SAE 0W-40 Signature Series 100% Synthetic Motor Oil (AZF)
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Super dave: space

I would buy again

I use this oil in ram 6.4 hemi I town a 25ft snowmobile trailer and 30ft travel trailer and I have had no problems. I have never had to add oil between changes.

Item Reviewed: SAE 0W-40 Signature Series 100% Synthetic Motor Oil (AZF)
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by CBR 322: space

Awesome product for boxster in WRL

Use in 2004 boxster S racecar. Awesome product. Last the whole enduro weekend without worry. Usually 15 hour endurance race.

Item Reviewed: SAE 0W-40 Signature Series 100% Synthetic Motor Oil (AZF)
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Lamar: space

Great product

It's the only brand I'll trust in my turbo vehicle. Oil seems to maintain it's qualities great and the old stuff still feels good when changing after 6,000 miles.

Item Reviewed: SAE 0W-40 Signature Series 100% Synthetic Motor Oil (AZF)
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Stemal: space

Simply the best

My engine runs cooler, oil pressure is 6 to 8 pounds higher couldn't be happier!!!

Item Reviewed: SAE 0W-40 Signature Series 100% Synthetic Motor Oil (AZF)
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Nic: space

I plan to buy again.

I have read on a number of websites and have heard over the years that Amsoil is the gold standard for motor oil. I finally registered for an account and am now using Amsoil Signature 0W-40 in my 2016 Ram 2500 6.4L 4x4. I switched to Amsoil at 500 miles and have just recently changed the oil again at 6000 miles. I have been getting reasonable mileage with my new truck (about 14.5 mpg average), considering I have the 6.4L and it's a 4x4. I recommend that if you plan to use Amsoil, to pay the small amount to become a Preferred Customer (currently $20 per year), because it will pay for itself in the savings per quart of oil (about $12.50 to $8.50 for the 0W-40 Signature Oil).

A quick story ... I turned a friend on to Amsoil, he started using 5W-30 Signature in his 2007 Nissan Quest with 60,000 miles. As early as the drive home from my house after changing the oil, his 15 year old son with a learner's permit could feel it running smoother and quieter, and now only one month later, he is already seeing 1-2 mpg increase in fuel economy. He plans to change his oil again at about 5000 miles and will then change it annually.

Item Reviewed: SAE 0W-40 Signature Series 100% Synthetic Motor Oil (AZF)
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Homer: space

The HEMI has it.

I have been using AMSOIL for 19 years now and wouldn't use anything but. I use this new 0w40 in my 2015 Challenger SRT 392. And have been using it now over the 5w30 in my old 2004 Ram 5.7 HEMI that has 193,000 miles on it all with AMSOIL.
The truck is running totally on AMSOIL products bumper to bumper. The challenger soon will also be covered with AMSOIL, But for now, just the engine.
My motor home, Jeep, and two KTM dirt bikes as all run with AMSOIL.
AMSOIL just can't be beat. And all of their products can be trusted to have what you drive running at its best.
Thanks AMSOIL

Item Reviewed: SAE 0W-40 Signature Series 100% Synthetic Motor Oil (AZF)
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Mconniff: space

Oil Change

I have spent most of my life using Mobile 1 products. When I found out that Mobile 1 didn't make oil for my new truck, I was at a loss. I do not like the oil brand (Pennzoil) that my dealership is pushing on me, Them: "You have to get your oil changes here because that is the only oil that you can use in your truck." Me: "Really? You're saying that Pennzoil is the only manufacture that makes a 0W-40 that meets the requirements of Ram... Challenge accepted." After doing some research on the Formula 1, NASCAR, NHRA race cars. Sending out e-mails and one hand written letter. My list was narrowed down to three manufactures. I currently have roughly 4k miles on my first AMSOil change. Once I get to 8k I will change it out and look at color, odor, and viscosity (how it feels) and compare it to some new oil. Then dissemble the oil filter. I am planning on ordering more oil because I feel once won't be enough to make a good judgement. However everything I have read and heard about AMSOil gives me reason to keep with this brand.

Item Reviewed: SAE 0W-40 Signature Series 100% Synthetic Motor Oil (AZF)
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Mack: space

OEM requirement

Spec. oil that is required for my SRT Jeep.

Item Reviewed: SAE 0W-40 Signature Series 100% Synthetic Motor Oil (AZF)
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by SRTcolin: space

Used in my DD SRT 8

I've used this in my daily driven SRT 8 for 10K miles, Blackstone oil sample came back with great results and they suggested I could go longer.

Item Reviewed: SAE 0W-40 Signature Series 100% Synthetic Motor Oil (AZF)
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by 300: space

The only oil that I use in my 6.4 ram

OIL AND AMSOIL OIL FILTER SEEMS LIKE A GOOD COMBO. Everytime I do a oil change oil comes still looking good not dark black like other brands.

Item Reviewed: SAE 0W-40 Signature Series 100% Synthetic Motor Oil (AZF)
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Chris: space

I would buy this oil again

I use it in my 392 hemi and love how it keeps the hemi smooth as butter

Item Reviewed: SAE 0W-40 Signature Series 100% Synthetic Motor Oil (AZF)
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Big Dawg: space

The Best

I use this oil in my cars. This oil is the best I have ever used. My engine runs very quiet and I get better gas mileage using this oil. I will never use another oil. Amsoil signature series is fantastic. Thank you Amsoil!!

Item Reviewed: SAE 0W-40 Signature Series 100% Synthetic Motor Oil (AZF)
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Kevin: space

I would buy again

Great stuff!

Item Reviewed: SAE 0W-40 Signature Series 100% Synthetic Motor Oil (AZF)
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Sean: space

Best synthetic oil

I use this oil for my Dogde Ram 2500 with the 6.4 hemi. The new 6.4's that Chrysler has out now takes 0w-40 oil. There's very few oil manufactures that make 0w-40. Since my truck was brand new only used Amsoil and love it. Wouldn't run anything else. Put just under 7500 miles on oil before changing, was still clean and not broken down. If you own a 6.4 hemi I would run Amsoil.

Item Reviewed: SAE 0W-40 Signature Series 100% Synthetic Motor Oil (AZF)
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Hemi guy: space

I will buy this product again

Second oil change coming up on my 2015 2500 dodge truck 392 hemi i'be used a lot of different oil a soil is the best by far

Item Reviewed: SAE 0W-40 Signature Series 100% Synthetic Motor Oil (AZF)
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by BootCampBob: space

Best Synthetic Oil Available

There are a lot of good synthetic engine oils on the market, but none better than Amsoil. I've been using it in all of my vehicles for seven years now, and haven't had any type of engine issues related to wear.
No, it's not the least expensive synthetic oil, but I don't "cheap out" when it comes to taking care of my cars. Only the best oil and filters for my machines. It's cheap insurance for my Hellcat.
There's really nothing more that needs to be said.

Item Reviewed: SAE 0W-40 Signature Series 100% Synthetic Motor Oil (AZF)
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by Joe: space

Its good stuff

Used in a 2015 Ram 2500, 6.4 Hemi. No tics,
Slightly better fuel economy.

Item Reviewed: SAE 0W-40 Signature Series 100% Synthetic Motor Oil (AZF)
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A Verified Buyer is an individual who has purchased the reviewed product and submitted their review through a specific process that tracks purchase history.Reviewed by No: space

Amsoil is great oil

I use amsoil in my hellcat it quite at my lifters and seems to add more smooth power

Item Reviewed: SAE 0W-40 Signature Series 100% Synthetic Motor Oil (AZF)
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