This full synthetic oil can be used in all three cavities of a Harley-DavidsonĀ« V-Twin, including engine, transmission and primary With our selective additive package, this oil yields exceptional viscosity, stability and lasting antioxidation qualities that cannot be derived from conventional base oils The synthetic base oil provides significantly better protection than conventional oil in high-temperature, air-cooled engines This fluid is extremely shear stable so the oil will stay consistent even with gear and engine forces Extreme pressure additives protect gears and other engine parts Long-lasting protection against engine wear Outstanding protection against sludge buildup Excellent sealing characteristics providing maximum power output Meets all warranty performance criteria for Harley-DavidsonĀ« engines and does not void new vehicle warranties Made in the U.S.A.. OIL DRAG DS3 SYN 20W50 GL