Bel Ray Thumper Racing Synthetic Mineral Ester Blend Oil

A combination of finest quality synthetic esters and highly-refined mineral base oils engineered for today’s 4-stroke single cylinder, multi-valve racing engines. Meets API SM and JASO MA2 requirements. Provides maximum anti-wear protection for valve-trains, rings, cylinders, and pistons, delivers maximum horsepower while providing consistent clutch performance. Suitable for air-cooled/liquid-cooled 4-stroke engines and wet clutches.