AMSOIL V-Twin Synthetic Primary Fluid is purpose-built for bikers who prefer a dedicated primary chaincase lubricant. Meets and exceeds primary fluid specifications for Harley Davidson®, Triumph® and pre-2013 INDIAN® bikes.
Package sizes include:
1-Quart Bottle
1-Quart Bottles (case of 12)
Meets and exceeds primary fluid specifications for Harley Davidson®, Triumph® and pre-2013 INDIAN® bikes.
AMSOIL V-Twin Synthetic Primary Fluid is purpose-built for bikers who prefer a dedicated primary chaincase lubricant. Its balanced formulation delivers consistent clutch feel for confident takeoffs, helping riders avoid killing the engine. It also protects components against wear to help riders get the most out of their bikes. V-Twin Synthetic Primary Fluid is Warranty Secure™ and will not void your motorcycle's warranty. It is a cost-effective, high-performance alternative to original equipment manufacturer (OEM) fluids.
V-Twin Synthetic Primary Fluid is formulated with a balanced additive system that provides consistent clutch performance and feel. It helps riders easily find neutral and promotes smooth acceleration, whether in stop-and-go city conditions or when on the highway. Its superior load-holding capacity helps prevent clutch slip for confident takeoffs.
V-Twin Synthetic Primary Fluid contains a heavy dose of anti-wear additives to protect the gears, chain and compensator bearing from premature wear. Its superior film strength helps protect against shock-loading, promoting reduced wear and longer component life.
In extreme heat, V-Twin Synthetic Primary Fluid's thermally stable synthetic formulation naturally resists the harmful effects of thermal breakdown. It helps components stay cool and achieve optimum performance and life.
V-Twin Synthetic Primary Fluid's balanced formulation reduces energy lost to drag in cold-temperature riding conditions. It promotes smooth shifts at startup and maximizes energy efficiency.
• Delivers consistent clutch feel for confident takeoffs
• Helps prevent clutch slip
• Provides smooth acceleration
• Helps riders easily find neutral
• Protects compensator bearing, chain and gears against wear
V-Twin Synthetic Primary Fluid is recommended for up to 10,000 miles or one year, whichever comes first.
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 MVP.
Keep out of the reach of children. Don't pollute. Return used oil to collection centers.
| TYPICAL TECHNICAL PROPERTIES | |
| V-Twin Synthetic Primary Fluid (MVP) | |
| Kinematic Viscosity @ 100°C, cSt (ASTM D445) | 18.7 |
| Kinematic Viscosity @ 40°C, cSt (ASTM D445) | 147.1 |
| Viscosity Index (ASTM D2270) | 144 |
| Pour Point °C (°F) (ASTM D97) | -37 (-35) |
| Flash Point °C (°F) (ASTM D92) | 244 (471) |
| Fire Point °C (°F) (ASTM D92) | 256 (493) |
| Four Ball Wear Test (ASTM D4172 @ 40 kgf, 150°C, 1800 rpm, 1 hour),Scar, mm | 0.39 |
| JASO T 904 Friction Test | MA/MA2, Pass |
Product Name: V-Twin Synthetic Primary Fluid (MVP)
Current Rating: 4.81out of 5 stars
Votes & Reviews: 94 vote(s) and 139 user reviews.
Reviewed by Mark: 
Excellent primary oil! No clutch issues at all. I cruise around 100mph on my Harley all the time.
Reviewed by Ronnie:
i use this in my harley, i also use it in about 30 harleys that i service. great oil
Reviewed by Maximo:
After my ride to sturgis 5000 the oil look very bad the engine started to make noise very bad when back too the harley Davidson oil
Reviewed by Chris:
Better then OEM
Reviewed by Michael:
I use in my 2017 sgs
Reviewed by Russell:
Like this product
Reviewed by Giuseppe:
cluth engages well.very smooth
Reviewed by Victoria:
Quality product!
Reviewed by David:
Use in my Night Train Harley, best oil ever !!
Reviewed by Douglas:
Been using on 2015 RG since new. 20k plus and no issues!
Reviewed by Jacques:
Engine runs cooker, lasting a long time
Reviewed by Jack:
Only oil I use in my bikes.
Reviewed by James:
Use this in my 13 Harley Davidson.
Quiter primary chain. It's also made specifically for the primary. A wise choice if you want your ride to last.
Reviewed by Keneth:
Have had no issue with this product bike runs smoothly
Reviewed by Steve:
First time I used it was this season and ai noticed the difference. I use to use the same fluid in all three locations but not anymore.
Reviewed by Mac:
Works great
Reviewed by Larry:
I just it in my 2005 Harley, it was making a little noise and after running it for 4 hours I could not hear it. I started using it after I bought a caroff a person who was using it in a 2005 Mercury and I am still using your product.
Reviewed by Tom:
Great product
Reviewed by Ryan:
Looked like great fluid
Reviewed by TOM:
Used for my Harley, won't use anything else.
Reviewed by John:
Running this oil the bike runs nice and quiet
Reviewed by Ted:
This product holds up for extended oil changes and clutch grab is constant even at high temperatures
Reviewed by Fred:
Been using for years servicing
Vtwins with excellent results
Reviewed by Ed:
2016 HD Road King
Reviewed by Tim:
When you need the best for your bike, you use a dedicated lubricant. I've stress tested this oil up to 7K miles with a great oil analysis report.
Reviewed by Al:
Use this in both my 2006 Heritage and 2012 Ultra Classic. Seems to have reduced tensioner shoe wear considerably
Reviewed by Michael:
I was using Amsoil 20W50 in the past, decided to give the Primary oil a chance, not disappointed, my 06 HD Road King runs great.
Reviewed by Paul:
Shift smooth and quiet
Reviewed by Steven:
Great for the big touring bike, keeps the clutch plates for heating up
Reviewed by Karl:
2004 Harley
Reviewed by Eric:
Best product. Will not run anything else.
Reviewed by Terry:
Use it in my 2015 Tri Glide. It's an excellent oil.
Reviewed by Carlyle:
Seems to be working well. My engine is running smoothly.
Reviewed by Armand:
Great lub
Reviewed by Tim:
I noticed when I switched from Amzoil 20/50 motorcycle engine oil to the Synthetic V-Twin Primary Fluid in the chaincase of my 2013 Harley Davidson Streetglide it sounded quieter riding slow in first gear, in places like my street or in parking lots. That first gear whine just went away. With that kind of friction gone I feel like it absolutely must be giving my machine better protection.
Reviewed by Joseph:
I run Amsoil in all my gas powerd toys
Reviewed by Rick:
Only oil I use for my harley davidson. Holds up to the extreme temperatures. Highly recommend.
Reviewed by James:
Primary is quieter clutch feels good
Reviewed by Bob:
I have 59,000 miles on my 2005 Harley Road Glide. It runs great. Had to replace the compensator, found the inside of the case very clean.
Reviewed by Dennis:
I use it on all my Harley's, it's as advertised
Reviewed by Jim:
motorcycle great product
Reviewed by Timothy:
I have been using this oil for over 17 years and my bike has had no issues due to consistency in oil changes
Reviewed by Romano:
I use these products both mine and my wife's 2015 Harley Davidson Road Glides. I've used them for many years with great success. Love Amsoil products.
Reviewed by David:
Primary on my 2000 Heritage Softail Classic
Reviewed by Steve:
Been using Amsoil for years. Use it in all my vehicles and even got my girlfriend too use as well.
Reviewed by Jonathan:
Fast delivery and a great product.
Reviewed by MARIO:
Major improvements
Reviewed by Nick:
I have been using this in my big twin primary's for a few year and have not had any problem. Clutch feels good.
Reviewed by Robert:
great oil
Reviewed by Robb:
Great product!
Reviewed by Tim:
Started using Amsoil when I bought my first Harley 6 years ago then changed all my vehicles over tok it I love the oil and won't use anything else
Reviewed by Roger:
I have been using this product since 2014 on my bike and I've also used it on one of my older bikes also. Exceptional product far exceeds manufacturer's specs this is the only product I use in my primaries
Reviewed by Hdman:
I run this in my 14 ultra works great love it
Reviewed by Superglide99:
I run this in my primary.....smooth shifting, pops into neutral like papa into mama.
Reviewed by Paul:
I use Amsoil in all my vehicles, very pleased and will continue using when I buy new ones.
Reviewed by Sergeant Shults:
I use this oil in my 2014 Street Glide and change it like clockwork every 5,000 miles. I dont have anything bad to say about it. V
Reviewed by G:
Love the idea of having a single fluid for my primary and tranny. Checked the temp after a run and found it to be a lot cooler with little noise. My bike is 27 years old and needs the best and this is it.
Reviewed by Cunfuzed:
Nice having a dedicated oil for the primary
It does quiet it down
Reviewed by Uncle Bob:
This stuff works great on a stock Harley clutch however if you are running a Barnett Clutch you can't run synthetic oil in the primary
Reviewed by Hemi:
Great product and good quality performance
Reviewed by G Money:
Much smoother shifts .
Reviewed by Brad:
Used to use Mobil 1, switched to the Amsoil primary a few years ago and love it. Definitely recommend.
Reviewed by MwR:
great product! Have been using it in my two HD motorcycles since the fluid was introduced and have no issues.
Reviewed by DW:
Best of the best
Reviewed by JR:
I have used Amsoil products for years and have never had a lubrication related issue. Amsoil Primary Fluid is another great product.
Reviewed by Kevin:
I have been using Amsoil in most all my Vehicles for over 12 years. Their line of products are phenomenal. An their signature Series take the worry out of those absent minded young ones cars who just get in the car and drive as long as it has gas. LOL!
Reviewed by Trotts:
Great product. currently run all amsoil fluids in my HD. Previously used in my Victory MC.
Reviewed by Jim:
There is no oil that will EVER go in my Electra Glide Ultra Classic but AMSOIL.. I was a Doubter, but after using this oil, I'm a true believer! I've tried them all and AMSOIL is HEAD AND SHOULDERS ABOVE ANY OTHER OIL!
Reviewed by Rich:
Took a little over 100 miles but had the whole bike quiet down
Reviewed by Sam:
Easier to find neutral
Reviewed by Andy:
The only primary fluid I use in my Road King.
Reviewed by Zigman:
Available all over North America where i ride. For my private shop i buy it by the case and save.
Reviewed by Bud:
I changed the Primary Chain Oil for the first time since I purchased the Bike. Neutral is so much easier to find. The Clutch seems to Engage and Disengage smother.
Reviewed by Captain Jacob:
I've been using Amsoil for about 6 months and do very much like their products. Harley Davidson oil seems thin out after a few times in the heat and living in the dirty south get hot! I have been using Amsoil since i traded in my old Harley for a new 2018 Road Glide and have no plans on changing. I've also used Mobil 1 VTwin in my 2011 and had very excessive top end noise while running that brand. Amsoil has not caused any of that and I've had 3 friends now go to Amsoil in their Harley's. Also I love that I order it and have 2 days later. Great products.
Reviewed by Big Train Street Glide Special:
The only primary fluid I use.
Reviewed by CaptainDean:
Only way to go
Reviewed by Willy:
Appeared to be less grime on my magnets when changing fluid. Nice confidence boost.
Reviewed by Neil:
Ya don't use engine oil in a primary case
Reviewed by Troybilt:
Was sceptical about synthetics, did my own research. Bought Amsoil due to my research. Put it in all 3 holes on my 07 Harley ultra classic. Beyond happy. Quieter transmission and lower running temps over conventional oil.
Reviewed by Stephen:
Have had bearing issues and when I spoke with a representative about the issue they told me it was a slack adjuster problem with the system and I changed the stock adjuster to and aftermarket unit and when this product came out I've used it ever since with no issues also!
Reviewed by Hills:
I love using amsoil in my Harley Davidson Fatboy and other vehicles and small engines. Keeps them running smooth and at a cooler temperature
Reviewed by RGU16:
The only thing I use in my Harley-Davidson Motorcycle.
Reviewed by Jemzor:
I've seen and heard of just using the same 20W-50 from your oil change and pouring that into the Primary case. I'm more a fan of dedicated oil that has different weights and viscosity for different jobs. So far, I've had my primary serviced twice for factory optional recalls at a Harley dealer and they've both times said my stuff was in great shape. I tell them I use this Primary fluid from Amsoil and they say keep on doing what I'm doing because it's working great.
Reviewed by Garry:
does a good job...Even in Florida heat...
Reviewed by Michael:
I use this in all primary cases,it's a heavy oil than the motor oil and designed for the primary and clutch
Reviewed by The tiger:
As a engine builder and racer if you own a Harley-Davidson you need Amsoil in all of your bike, cooler running smooth shifts and better clutch feel.
Reviewed by TimU:
In the first 600 miles on my 2007 Ultra Classic I was bothered by a constantly moving friction point with my clutch. Sometime it would grab. Sometimes it would work just fine. Sometimes it felt like it was slipping. Harely had put their 20W-50 in the primary case at the assembly plant! At the 600 mile service I changed to Amsoil Primary Fluid. Problems solved. I've had perfect clutch action for 58,400 miles. Auto tensioner ware block looks new too. (I just changed the auto tensioner to a manual adjuster because the auto one made the primary chain too tight).
Reviewed by Frank:
Great deals on oils
Reviewed by BC:
This is the best primary oil you can buy period. It helps quiet the whole clutch assembly and makes for smooth clutch operation.
Reviewed by Buck:
I live in a climate with triple digit temperatures. This product helps to keep the engine running smooth on hot summer days and might contribute to cooling.
Reviewed by Razztus:
I have used this primary fluid in all my Harleys without any issues. No clutch slippage either like some people think will happen because they say "it's too slippery". Very minimal metallic dust on the drain magnet. Do not hesitate to use this product.
Reviewed by Batman:
Just did my first primary adding this product .
Reviewed by mike:
in all my engine
Reviewed by Jay:
I have started using this in my primary and it works great.
Reviewed by Chuck D:
If you spend 25k on your Harley why would you use anything but Amsoil !!!
Reviewed by Kburg211:
Great product and very satisfied. Will continue to use Amsoil for my bikes.
Reviewed by telcotech retired:
I cant say anything bad about this product. Just wished it didn't take so long to arrive after i Ordered it.
Reviewed by Brian:
Runs great
Reviewed by Dewey:
I Wouldn't Run Anything Else in My Primary Now! Dramatic Improvement in Clutch Feel and No More Noisy "CLUNK" when Shifting into 1st Gear from Neutral! So Much Easier to Find Nuetral Running this Product and Shifts are Improved also... Great Job Amsoilf
Reviewed by JW:
It's pretty simple, there are two things that will kill any V-twin engine, heat and friction. So engine oil is one of the most important things to consider, because it has to eliminate friction and be able to withstand high temperatures without breaking down. I use AMZOIL because it is the best lubricant available, and to help it so it's job, I use Love Jugs cooling fans to keep my engine from ever overheating. Between those two things I can feel confident on a long and trouble free engine in my 2012 FLTRU. I also use AMZOIL transmission oil and Primary oil and now have over 48,000 trouble free miles on my ride.
Reviewed by Robert:
Holds up well, even in the Las Vegas heat.
Reviewed by John R.:
I have family members and friend that use this oil on their Harley Davidson with great results.
Reviewed by mule:
use in 2016 street glide
prefer using a dedicated fluid do not have enough miles since changing to amsoil to determine long term effects
short term is shifting it softer no clunking neutral easier to find
Reviewed by Lone Rider:
Quieter,smoother...dependable!
Reviewed by Dave:
Use this in my Harley and will purchase it again the next time I change the Primary Fluid.
Reviewed by Brian:
So far so good no complaints yet
Reviewed by Dave 300:
Seems to work very well in the primary. Very quiet.
Reviewed by Jemeda11:
I use amsoil in all my bikes cars motors and even for my firearms.
Reviewed by Jim:
Amsoil and filters are all I will use in my HD😎
Reviewed by Dakotaman:
I noticed that the engagement of the clutch seems much smoother since I changed to your primary fluid. It certainly shifts a lot easier with less noise.
Reviewed by Dmack:
This primary fluid does a great job lubricating and quieting the compensators that are known to be noisy for HD 103 engines.
Reviewed by TOM P.:
Prior to setting out with my sons on our annual motorcycle trip, I changed the oils in our Harley Davidson touring bikes, a CVO Ultra, CVO Road King and a Screaming Eagle 103 stage 4 Road King. We used AMSOIL V-Twin Primary, V-Twin Tranny and 20w-50 Synthetic V-Twin engine oils.
We then proceed on a two week, 3500 mile journey through Arizona, Nevada, and California in temperatures ranging from 38 degrees to record breaking heat as high as 118 in Death Valley CA. A few days the temperature never dropped below 100 degrees. Averaging 300 miles a day, the HDs performed perfectly. While others in our group of 14 bikes had a variety of lubricant related problems, our AMSOIL equipped motorcycles had zero issues. Not surprised, I've been using AMSOiL products since the late '70 and have never experienced a lubrication related failure with any of my vehicles or equipment.
Reviewed by Nature Boy:
Have 113,000 on my Road King Harley Davidson... yep, on a Harley...
Reviewed by Harleyguy:
I have a 2004 Heritage Softail Classic with just over 60,000 miles on it. I've always used Amsoil 20w50 in the transmission, motor, and primary. I switched from 20w50 Amsoil to The V twin primary oil this year. I feel it gives better protection to the inner workings of the primary.I also switched to Amsoil transmission fluid. I still use 20w50 Amsoil in the motor.
Reviewed by Darkrider:
Makes it run cool and quite
Reviewed by Djgrimmy:
Motor seems smoother and quieter.
Reviewed by BOB:
I HAVE AN OLDER HARLEY, THE BIKE USED THREE DIFFERENT FLUIDS FOR ENGINE, PRIMARY, AND TRANSMISSION, NOT THE ONE FLUID FOR ALL. THIS PRODUCT MEETS MY REQUIREMENTS FOR THE PRIMARY AND DOES AND EXCELLENT JOB.
Reviewed by Russ:
Been running this product in all my V twins and alway see them running cooler and stronger.
Reviewed by gonecrazy:
Nothing bad to say, provides great protection and quieted my primary some too.
Reviewed by Danger:
I've been running Amsoil in my motorcycle for over 10 years without any problems. My dad has been running it since the '70's from dirt bikes to Harley's.
Reviewed by Joe:
Switched to a dedicated Primary lube, due to the OEM Synthetic taking out the transmission roller bearing on a long trip and no longer using one in all three. Noticeably smoother and less chain slap when shifting. One note though is the clutch really locks in so you need to have it adjusted correctly and pull it all the way in especially for 1st and 2nd.
Reviewed by Jake:
First time using it so verdict is out. Use The Tranny oil and engine oil so decided to give it a try,
Reviewed by K9 Rick:
Best synthetic oil I have every used! My Harley runs cooler than with other synthetics and seems to be cleaner when I change it than others were! Couldn't be happier!
Reviewed by Russell:
Works great, no issues. Mike shifts well.
Reviewed by Kenneth:
I finally broke the Mobile habit and am very pleased so far. I did the engine , transmission, and primary as well as oil filter all at the same time. Took a 1500 mile trip from Houston area to Near Branson MO. and was really pleased with the improved noise reduction, smoother quieter shifts and lower oil temps.
I will probably change all three fluids again at 5k miles and inspect. I do not anticipate replacing any of the products I am now using. Couldn't be more satisfied.
Kenneth Beckham
Reviewed by Stephen:
Used in garage for my bikes. Would be nice if it was part of the kit. Also do you have primary gaskets
Reviewed by Larry:
Seeing the many problems that late model Harleys seem to have with primary bearings, I want the best lubricant I can get. My choice is Amsoil V-Twin Primary Fluid. I have used it exclusively since it was introduced and have been very satisfied with its performance.
Reviewed by Richard:
The only fluid I use in my Harley's easy shifting and runs cooler
Reviewed by James:
Primary case oil better than syn 3
Reviewed by Barry:
I experienced a noticeably smoother clutch operation after a few hundred miles when switching from the original oil.
Reviewed by Barry:
The clutch works smoothly.
Reviewed by MARK:
My Street Glide runs cooler and quieter. No surprises with these products. If they make it for my application I use it!!
Reviewed by Robbie:
I use it in my Harley road king
Reviewed by Ken:
It works period. I have used Amsoil products for years and while other bikers are replacing parts with less miles than I have through two bikes I am still trouble free. It's just the best there is,.!
Reviewed by Marcus:
Works wonderful. No problems with primary lubrication or wear.
Reviewed by William:
Quiet shifting, smooth operation, definitely worth the money.
Reviewed by Randy:
Glad to see amsoil making primary fluid
Reviewed by Wade:
Love this stuff. Hot oil pressure in my 2012 Street glide improved
Canada
United States
I will continue to buy Amsoil Fluids for my motorcycle
I was having problems getting my motorcycle into neutral until I started using Amsoil Primary Fluid. The motorcycle has responded well to my using separate fluids instead of using one fluid for all three purposes.