All Purpose Performance For Land Products Yamalube 10W-40 includes high quality mineral base stocks for use in motorcycles, ATVs, Side x Sides and scooters. It provides stable clutch performance and film strength protecting your engine from the wear and tear of daily use. Motorsport Oil Yamaha set out to blend factory-approved engine oils with mineral base stocks that were everything but conventional. Excellent protection and technologically superior additives make this oil exceptional. Correct Viscosities For Each Application Yamalube Performance All Purpose oils are available in the precise multi-grade viscosity the factory recommends for your four stroke Yamaha. Each Yamalube Performance All Purpose formula meets or exceeds all factory requirements. Exceeds JASO MA. High-quality general use oil. Year-round applications. Ultra-clean additives. High-performance mineral.