Koyoto 4T 10W40 SL /JASO MA is designed with high quality Synthetic Blend base stocks and advanced technology additive system to provide high level of protection and performance.It works harder than other conventional motor oils by continuously preventing dirt and sludge build-up and reduces engine noise. This product meets the requirements of most motorcycle manufacturers and is suitable for use in 4 stroke gasoline engines, naturally aspirated or turbo charged engines, operating in all round seasons and adapted to vehicles equipped with catalytic converters running on unleaded fuels.