Full Synthetic V-Twin Engine Oil Full synthetic, ester-based motorcycle oil specifically formulated for V-Twin engines. Advanced technology lowers operating temperatures, reduces wear, increases film strength and offers extended protection. Regenerative polymer system resists mechanical shearing and heat breakdown of the oil, offering exceptional viscosity retention in severe climates. Superior additive package keeps engines clean, protects against sludge and allows for trouble free operation. Engineered and approved to be used as multicompartment oil for all Harley-Davidson V-Twin engines, transmissions and primaries.