Indian Motorcycle Full Synthetic 15W-60 Motorcycle Engine Oil: The most advanced V-twin motorcycle oil on the market. It has been proven in dyno and field testing as well as AMA flat track racing to outperform leading aftermarket V-twin engine oils. Formulated with high-quality, powersports grade PAO synthetic base stocks. High performance oxidation and corrosion inhibitors keep engine internals clean and maximize power. Provides enhanced clutch lever feel with smooth shifting and protects clutch packs and transmission components against wear.