Customer Ratings & Reviews

i have a '98 Ultra Classic that was getting harder to shift. I changed out the clutch plates with a set of Barnett HP plates. I also changed the primary oil out to the Amsoil 60w synthetic. Wow what a difference. It has never shifted so well even when new. I also changed the engine oil to the same 60w. Contrary to beliefs, it is not to heavy during the Virginia cold winters.

I switched to Amsoil's 20w-40 V-Twin formula a couple thousand miles ago in my '17 Indian Springfield, with the Thunderstroke 111ci. Right out of the gate I could feel a positive change in my bike....I could now find neutral easily! Other than that, time will tell. But just from that it shows my the internals are running smoothly. Also, some are scared to run "Full Synthetic" in their bikes, fearing clutch slippage. It's in both my wife's Chief and my Springfield. No slippage! There are no friction modifiers in this, so it's good to go for wet clutches. I will continue to use it.

I've been using AMSOIL products in my motorcycles for the lastest 20 years and could not be happier when doing motor work and seeing how good the products work.

I use Amsoil in my motorcycle and car. I believe in the product completely and I know my vehicle's engine just runs better.

Best oil and protection on the market 1ST in synthetics for a reason dont run anything else!!!!

Use Amsoil in motorcycle & truck. Excellent products

Great oils great service

I buy all three types oil, engine, transmission, and primary.

I'm a new user to Amsoil, but using it in a Tahoe, Harley, and an Indian Scout.

I've been using Amsoil since 1993 in my Harley's. This is the only oil that I know that helps cool the motor. Amsoil has never failed me and I will always use this oil, and only this oil my in HD motor, tranny & primary.

Did an oil change on my harley Davidson bike runs much smoother than the regular harley stuff they use definitely an awesome product

This is the ONLY oil I trust in my bike. I've tried other oils that don't deliver, including all versions of OEM oil. After countless hours in parade mode, AMSOIL quieted the motor & drivetrain better than OEM. I run 10k miles on AMSOIL w/very little noticeable wear on any component, which is evident by less steel debris caught by the oil plug magnets, compared to what I did see running OEM.

2016 street glide with tire shredder kit in the motor. Amsoil ran 15 degrees cooler the royal purple. Have a ultra oil cooler with fans and oil filter that's reusable and supposedly lowers temperature by 5 degrees. Save your money and get the oil bud. No fan draw and it's hidden. I put the oil bud on and AMSOIL ran 15 degrees cooler than royal purple.

Best on the market

Noticeable reduction in oil temp.

I use this on both of our Harley's. I really like the combo kit with filter too. Primary oil and transmission fluid are great too.

Use this oil in my ultra limited, it runs quieter and cooler.

I use 20-50 motorcycle oil in my Y2K Heritage engine. When I changed from petroleum based engine oil to Amsoil I had to slow down the idle speed. I believe Amsoil does a superior job lubricating the engine. I ride year round in temps from 32 degrees F to 102 degrees F. I don't believe engine oil should be used in primary chain case or transmission. Engines, transmissions, and primary chain case all have different lubrication requirements. Select the right lubrication for the application.

I use amsoil in my Harleys to protect the engines and drivetrains. As a benefit the engines run a lot cooler.

Amsoil provides Full protection for those hot days while riding the HD air cooled twin.