A high-performance, general-use, mineral base oil, 10W-40 has an advanced additive package that features superior anti-frictional properties. Includes high quality mineral base stocks for use in motorcycles, ATVs, SSVs and scooters. Provides stable clutch performance and film strength protecting your engine from the wear and tear of daily use Excellent protection and technologically superior ultra-clean additives make this oil exceptional Precise multi-grade viscosity the factory recommends for your four stroke Yamaha Meets or exceeds JASO MA requirements, which ensures the oil will not cause clutch slippage or leave ashy deposits and meets anti-corrosion and wear standards Year-round applications