See How AMSOIL Performs in the Harley-Davidson® Milwaukee-Eight® Engine

AMSOIL Harley

Watch how AMSOIL performs in this 2019 Harley with a Milwaukee-Eight 107 engine after 1,000 miles of extreme-heat testing on the dyno.



AMSOIL vs. Harley-Davidson Oil: How We Perform

AMSOIL vs. Harley Oil

We submitted AMSOIL synthetic motorcycle oil and Harley-Davidson SYN3 oil to independent testing. Who came out on top? Find out here.



Motorcycle Engine Knocking: Here’s What You Can Do

Motorcycle Octane Boost

Engine detuning to prevent knocking can lead to rough idle and poor throttle response. Here’s an easy solution to motorcycle engine knocking.