Find the AMSOIL Products You Need

Better Protection

AMSOIL Synthetic V-Twin Motorcycle Oil resists viscosity breakdown 6X better than Harley-Davidson* SYN3* for improved protection against compensator and transmission gear wear.**

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Easy Oil Changes

Keep your Harley-Davidson running optimally and prolong engine and transmission life with everything needed to perform an oil change in one convenient box.

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Ride Hard, Run Cool®

AMSOIL synthetic motorcycle oils use premium synthetic base oils that naturally resist breakdown from extreme engine heat, so you can ride longer and farther.

We Love Motorcycles

We’re thrilled to sponsor several iconic American motorcycle events and races for millions of riders every year, including the Sturgis, Daytona and Laconia rallies.

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Motorcyclists Love AMSOIL

"I’ve run into some very hot summer traffic in Branson, Missouri and the oil pressure and temperature stayed amazingly stable under extreme-heat conditions."

Gary, Verified Buyer


AMSOIL synthetic motorcycle oil is engineered to deliver superior engine protection that maximizes the performance and life of your motorcycle.

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**Based on testing of AMSOIL 20W-50 Synthetic V-Twin Motorcycle Oil purchased on 3/19/19 and Harley-Davison Screamin' Eagle SYN3 purchased on 3/19/19 in the CEC L45-KRL, ASTM D445 test

AMSOIL Disclaimer and Technical Concerns

Specifications contained on this website are based on manufacturers' information and were believed accurate at the time of publication. Our recommendations apply to AMSOIL products only, as we cannot be responsible for products from other manufacturers. Always compare fluids and lubricants that were installed in the vehicle with those replacing them during service. Never install more fluid or lubricant than what is considered adequate according to gradients on dipstick or level of filler hole. Fill and drain locations are for reference only. Failure to perform adequate inspections or obtain proper resolution will limit or negate any liability toward AMSOIL INC. Models introduced midyear may not have the same specifications as those produced earlier.

If any discrepancies are noted, they can be simply reported to AMSOIL by clicking on the "Problem?" link docked to the left. We review all reported problems, if you would like a personal response to the issue you are reporting please enter your email address in the space provided on the form.