Maxima V-Twin Synthetic Blend Engine Oil Features Semi-Synthetic, ester based motorcycle oil formulated for V-Twin Engines Advanced polymer system resists mechanical shearing and heat breakdown of the oil offering unsurpassed viscosity retention Advanced technology lowers operating temperatures, reduces wear, increases film strength and extended protection Superior additive package keeps engines clean, protects against sludge and allows for trouble free operation Meets all Harley Davidson engines and does not void new engine warranties