Extra4 is a 100% synthetic motor oil featuring advanced additive technology. By using today's most advanced additive systems and high-performance synthetic ester-based stocks, Maxima have engineered what they believe to be the finest 4-cycle motorcycle specific oil available on the market today. The very latest shear stable polymer systems have been used to assure viscosity stability and virtually eliminate transmission "shear-down" of the oil. Usage: For all air and water-cooled 4-cycle gasoline engines. 100% triple-ester blend. Reduces friction and engine temperatures. Viscosity stable. Anti-wear and anti-scuff additives. All weather formula. Easy starts. Reduces engine wear. Improves fuel economy. Smoother transmission shifting. Superior engine cleanliness. Extends drain intervals. Formulated for "Wet" clutches.