Product Reviewed: V-Twin Synthetic Primary Fluid (MVP)
Current Rating: 4.81 out of 5 stars
Votes & Reviews: 95 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
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.