Bel-Ray® EXP Synthetic Ester Blend 4T Engine Oil is a 4-stroke motorcycle oil that combines the finest quality synthetic oils with select mineral base oils ensuring the highest level of protection for all 4-stroke motorcycles. Contains shear resistant VI improvers to resist viscosity breakdown. Meets the performance requirements of API SM and JASO MA2. Suitable for air-cooled / liquid-cooled 4-stroke engines and wet clutches. For use in all 4-stroke engines requiring an oil meeting the API SG / SH / SJ / SL /SM standards. For use in all 4-stroke motorcycles with or without wet clutches including those specifying the use of a JASO MA / MA1 / MA2 qualified oil. Superior anti-wear - Reduced cylinder and ring wear. Longer bearing life. Superior deposit control - Cleans deposits, controls sludge and varnish formation. Keeps ring lands and grooves free of carbon build-up.