Bel-Ray Scooter Synthetic Ester Blend 4T Engine Oil - 5W40 - 1L. 99429-B1LW 4-stroke synthetic oil that combines the finest quality synthetic fluids with select mineral base oils ensuring the highest level of protection for all 4-stroke scooters Contains shear resistant VI improves 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