Maxum4 Classic is an exclusive blend of petroleum base stocks and high load anti-wear, anti-shear and liquid moly additives. This formula is designed to handle extreme loads at peak temperatures in high performance air-cooled 4-cycle engines. Maxum4 Classic assures viscosity stability and reduces bearing wear on cams lifters and other critical engine parts. Our proven formula is temperature resistant and delivers optimum engine cleanliness while exceeding manufacturer’s requirements for engine lubrication.