Racers can't win what they don't finish. That's why AMSOIL formulators built DOMINATOR® 2-Stroke Racing Oil. This complex blend of oils and additives directly addresses the heat, pressure and friction of race-engineered engines. These engines operate on the edge, yet engine reliability is critical. DOMINATOR does an outstanding job protecting high-performance engines. It adds durability that professional racing teams depend on and delivers confidence so engines can be pushed to the limit.
Package sizes include:
Quart Bottle
Gallon Bottle
16-Gallon Keg
30-Gallon Drum
55-Gallon Drum
Use in high-performance stock or modified two-stroke engines, including air- or liquid-cooled snowmobiles, personal watercraft, motorcycles (moto X), ATVs, go-carts and outboard motors**. Good for use with coated or non-coated pistons, high-octane racing fuels and exhaust power valves. Compatible with most other two-stroke oils; however, mixing oils should be minimized.
Use in oil-injected and pre-mix applications that require API TC oils. In pre-mix applications, DOMINATOR delivers outstanding protection at 50:1 (2.6 oz. oil per U.S. gallon of gas), although many racers modify the mix ratio to suit their setup. Not suitable for use with alcohol or nitro-methane fuels.
** Not suitable for long-term use in outboard motors as a TC-W3-type oil, although excellent as a race oil for short-term use where motors are periodically inspected.
DOMINATOR, an AMSOIL exclusive formulation, lubricates and protects high performance two-cycle motors, both on and off the track. High performance motors, particularly those that are modified, operate hotter and at higher RPMs than recreational motors, and they need good oil for peak performance. DOMINATOR is engineered for racing. It has the right film strength and clean burning properties for "on the edge" operation.
• Provides excellent film strength for high heat, high RPM motors
• Reduces friction for maximum power
• Recommended for use with coated or non-coated racing pistons
• Recommended for use with exhaust power valves
• Recommended for use with high octane racing gas
• Burns clean; Prevents ring sticking and plug fouling
• Provides excellent protection at 50:1 pre-mix or in injection system
High-performance and race-designed two-stroke engines operate under severe conditions. They are modified for higher compression ratios, higher rpm and leaner combustion, all of which increase heat and pressure. High heat can quickly burn off light oils and cause rapid piston expansion, decreasing piston-to-cylinder wall clearances and increasing the likelihood of piston scuffing and seizure. High pressure can exceed the film strength of low-viscosity oils, which promotes crankshaft bearing wear and pitting.
DOMINATOR is purpose-built for outstanding film strength and lubricity. It is engineered with carefully selected, higher-viscosity synthetic base oils to withstand the high heat and pressure common to high-performance and racing applications. DOMINATOR's anti-friction chemistry is race-proven to provide an extra measure of protection against piston scuffing and bearing wear.
The oil and fuel burned in the two-stroke combustion process leave destructive deposits on the pistons, rings and in the combustion chamber. Excessive deposits can lead to catastrophic engine problems, including ring sticking, exhaust port blocking and pre-ignition.
AMSOIL DOMINATOR is formulated with clean-burning synthetic base oils and powerful high-temperature detergent additives for exceptional deposit control. It helps prevent the power-robbing carbon deposits that cause ring sticking, exhaust port blocking and pre-ignition. AMSOIL DOMINATOR is optimized for severe service.
During the opening weekend of the 2015/16 AMSOIL Championship Snocross season, professional rider Lincoln Lemieux's Ski-Doo* RS600 suffered a broken hose clamp, allowing the coolant to pump from the system. The intense heat that resulted melted the exhaust power valve covers, O-rings and engine gaskets. DOMINATOR Synthetic 2-Stroke Racing Oil, however, delivered exceptional protection despite the severe conditions. The rings and pistons were still free and the crankshaft turned freely. Scheuring Speed Sports is able to reuse the engine after repairing the melted parts, providing concrete testimony of DOMINATOR's superior performance.
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 TDR.
Keep out of the reach of children. Don't pollute. Return used oil to collection centers.
| TYPICAL TECHNICAL PROPERTIES DOMINATOR® Synthetic 2-Stroke Racing Oil | |
| Kinematic Viscosity @ 100°C, cSt (ASTM D445) | 7.0 |
| Kinematic Viscosity @ 40°C, cSt (ASTM D445) | 35.2 |
| Viscosity Index (ASTM D2270) | 166 |
| Pour Point °C (°F) (ASTM D97) | -54 (-65) |
| Flash Point °C (°F) (ASTM D92) | 94 (201) |
| Fire Point °C (°F) (ASTM D92) | 94 (201) |
See what happens when snowmobile looses all of its coolant while still on the track!
Product Name: DOMINATOR™ Synthetic 2-Cycle Racing Oil (TDR)
Current Rating: 4.94out of 5 stars
Votes & Reviews: 78 vote(s) and 48 user reviews.
Reviewed by BC: 
I've been using this oil in my rx8 for a few years now and it is great for premixing with fuel and in the oil injection system. Rotaries need fresh two cycle oil and this stuff works
Reviewed by Jobajoe:
I have used other higher priced synthetics and this Dominator from Amsoil burns cleaner, gives great protection and costs less! Been running in cr500af for past couple months, will buy again.
Reviewed by Kid fast:
All I use is a soul I run it as a premix in my two strokes it is the best premix I have used I run 40:1 and it runs great no detonating and no problems minimal to no smoke not a potent smell it's just all round great oil the best.
Reviewed by Ken:
I have heard of Amsoil a long time. This is the first time I have used it. Seems like really good stuff without breaking the bank. I bought a 1 year membership and bought a bunch of supplies for the start of desert season.
Reviewed by Ken:
I have heard of Amsoil a long time. This is the first time I have used it. Seems like really good stuff without breaking the bank. I bought a 1 year membership and bought a bunch of supplies for the start of desert season.
Reviewed by billyghoate:
I live in fl where it is hot in the summer. Oil breakdown is paramount on my harley's engine life! With the viscosity and proven quality of Amsoil 60 wt oil it has served me and my ultra classic bike like no other! Oil changes every 20k makes it well worth the couple $$ more for Amsoil than cheap competitor oils. Make it your own choice like i did for everything from weedeaters to my truck!
Reviewed by Enduro Eddie:
I use the dominator pre mix oil in my 2015 Ktm 250 xcw. I mix it at 50:1 with 91 octane pump gas. Have had no problems with it and bike runs great at all temperature ranges. I race hare scrambles and enduros as a B rider so I am putting it through it's paces and it has performed great!
Reviewed by Aaron Ford:
I have used several other racing oils and have had issues with all of them. Maxima Castor 927 came out of solution when the temperatures dropped. Klotz required regular remixing. I started using Dominator after my last piston change. That was 2 years ago. I haven't bought a piston since. It mixes easily. It stays in solution. The red color makes identifying the fuels easy, especially when the tags fall off the cans...
Reviewed by Ryno:
Dominator is the best oil I have ever used.
Reviewed by C&R Cycles:
Only product I recommend in my shop for 2 strokes.
Reviewed by C&R Cycles:
Only product I recommend in my shop for 2 strokes.
Reviewed by Bowman:
Used in a 2017 YZ125 ..... piston wasn't changed until after 30+ hours and it looked like new. Something must be working, I'm guessing the DOMINATOR 2 stroke oil
Reviewed by Off-road457:
Great 2 stroke oil. Burns clean and keeps my bike running strong. Going on 105 hours on the motor with no issues. Run it in everything 2 stroke I own
Reviewed by Jimmy:
Have tried other oils and had loading issues along with fouling plugs. I switched to the Dominator 1.5 years ago and have not fouled a plug since.
Reviewed by Motomom:
We as a family use this in all our 2 stroke toys. My boys race a KTM 50 pro senior & a YZ 85. They run great on this & it's honestly our favorite that we've tried in them. The only thing is the KTM does smoke & we do mix it to the ratio called for.
Reviewed by Big Hoss:
I wouldn't use any other 2 stroke oil on the market
Reviewed by Race Developed:
I ride a high strung, 40+ year old 2 stroke street bike and Dominator 2 stroke oil fits the bill perfectly
Reviewed by Zach:
I use Dominator 2 stroke oil in my dirt bike because that's what the previous owner used at it works great. I've hade no issues and have kept used because of that!
Reviewed by Jones Racing:
This oil is the best that we have found to use in our 2013 KX 100. While doing our tear down on the bike, there were no scuff marks on the piston, like we have seen with other cheap oils. Would recommend this product to anyone looking to improve the quality of your 2 strokes.
Reviewed by Mc:
I am a landscape contractor and run a lot of 2 cycle equipment. I switched to this oil because it costs less than half that of name brand synthetic mixes and it works just as good if not better. I buy it by the gallon which is more practical than the single use bottles. No smoking or fouling of any kind
Reviewed by Boots:
I use this product on my yz 125 two stroke. It is high quality and runs smooth.
Reviewed by Dale:
I started using this oil 10 yrs ago and wouldn't consider using any other.
Reviewed by Garaj:
Love the Amsoil Dominator. Bike runs smooth with no fouling issue and reduced carbon build up on top of piston. Would recommend this product to any 2 stroke rider. Will be placing and order for more soon.
Reviewed by bill karter:
we have used amsoil dominator for15+ years,have won 50+ races,25+ national events. as our engine builder i love it's clean burn,and not having any oil related problems. great product!
Reviewed by 12gage:
Best 2 stroke dirt bike oil
Reviewed by Iceman:
I use this oil for my 4 Yamaha snowmobiles. It is great for cold and warm weather and all nasty conditions the Colorado winters can dish out.
Reviewed by Gary:
Never a problem and keeps the inside of my 2 stroke clean
Reviewed by Jon:
We run Dominator in all our pre-mix machines.
Excellent performance under race conditions
Reviewed by Cragar:
i've been using this product in my atv
and snowmobiles for years i've even used it in small engines when i ran out of saber awesome product gives you peace of mind and trouble free equipment
Reviewed by Opps:
I use it in my snowmobiles! High quality product at a fraction of the cost of dealer pricing!
Reviewed by Willt17:
I've been using this premix oil for almost 2 years on the advice of a friend and it works extremely well. Great protection.
Reviewed by RalphTE300:
I am new to the 2 stroke world but everyone has told me this oil is the best. After using it now for over a 1000 miles my bike is running as good as it can!
Reviewed by ANDREA:
Best 2 stroke oil on the market! Keeps our dirt bikes running strong!!
Reviewed by RAPTOR 28:
I run DOMINATOR 2-Stroke Racing Oil I in my Raptor De 2 race car that is powered by a 494 rotax snow mobile motor. I never worry about problems evem in the heat of Florida or the severe stress running at Daytona Speedwlay. I have never had a problem and the motor always looks like new at rebuild time. Thanks Amsoil for a great product.
Reviewed by J-rod:
Run in all my equipment and buggies. Cr500 in high Rev sand buggy, will not seize even with known air leak... should have seized but never did... amazing
Reviewed by Mxzone114:
Always used Dominator 2stroke synthetic in my bikes. Never had any problems with the oil & the performance is outstanding.
Reviewed by STR8SHOOTR:
I love this 2 stroke oil. I've used oil that would settle on the bottom of the tank and you have to do the front brake shake. This stuff mixes and stays mixed. It smokes just enough and has minimal sludge on the pipe. I disassembled my top end after 60hrs and it looked good. Gonna check it again at 100hrs and do a top end if needed.
Reviewed by Tony the whapaho:
I have 700 twin Polaris that I run on asphalt running 10.90 & 121 mp. Have been using dominator 15 years no problems at grand bend drag way . Ont Canada
Reviewed by That's Right:
I use Dominator in all my boats from pleasure boats at 7,000 RPMs and race boat turning 10,000 RPMs spraying Nitrous. Since I started using Dominator 2 Stoke Oil I have not had any (not 1) engine failure. I believe in this product and would not consider anything else.
Reviewed by Scooter:
I have been using this oil for racing grandson's YZ125 for Four years and have yet had to replace a plug during a race weekend.
Reviewed by Jerry:
Best two stroke oil product I have ever used on my race bikes!!!! Highly recommended!!
Reviewed by YZ Tommy:
My son races a Yamaha YZ 85 weekly. With a competitors oil I would change pistons every 6 weeks. With Amsoil Dominator 2 stroke oil I am on the oriiginal piston. Just two sets of rings.
Reviewed by Ryan 250sx:
I use Dominator in everything from my chainsaw to my KTM 250sx. It helps engine stand up to the abuse of long races.
Reviewed by RAPTOR 28:
I run this product in my race car that is powered by a 494 rotax snow mobile motor
I never worry about problems evem in the heat of Florida or the severe stress running at Daytona Speedwlay. I have never had a problem and the motor always looks like new at rebuild time. Thanks Amsoil for a great product.
Reviewed by MX Dad:
Dominator is the ONLY oil that we use in our 2 stroke MX race bikes. I maintain a fleet of 6-8 2 stroke MX bikes that our family races. Piston and ring life is longer, oil burns cleaner, less pipe "spooge", fewer fouled plugs and it is my belief that this oil does not break down as quickly when left mixed with fuel in a tank or fuel jug for a period of time.
Reviewed by Groves199:
Never had an engine failure related to lubrication deficiency and we've been using Amsoil Dominator for a long time. It's the only two stroke oil that gets used in our race bikes. It's hard to argue with proven results.
Reviewed by Jake T:
Been racing motocross for 12 years and have been using amsoil dominator from the beginning and refuse to run anything else. We've had nothing but great performance and reliability with our bikes.
Canada
United States
Best high performance 2 stroke oil
I use the Dominator 2 stroke oil in my high-performance jet skis and no problems, Inside looks like new when you do a yearly tear down.