AMSOIL is never shy to put their products in head-to-head comparisons. In the article AMSOIL vs. Harley Davidson Motorcycle Oil, we show how the AMSOIL 20W-50 and SAE 60 Synthetic Motorcycle Oils fare against Harley Screamin’ Eagle Synthetic 20W-50 and H-D 360 SAE 60. Test procedures are used that give us an indication as to how they protect your engine under extreme conditions. When it comes to air-cooled V-twins, extreme conditions are not the exception.

AMSOIL Synthetic 20W-50 Motorcycle OilIn the 20W-50 segment, the boundary lubrication protection is measured in the 4-ball wear test. This gives us an indication as to how the oils will guard against metal-to-metal contact.

In the SAE 60 shootout, the motorcycle oils are subjected to the high temperature/high shear test. This trial demonstrates how well the oils can maintain their viscosity under extreme heat and heavy loads.