Maxima CS31901-12PK Maxum4 Classic Big Twin 60WT Motorcycle Engine Oil - 1 Liter Bottle, (Case of 12) Maxum4 Classic is an exclusive blend of petroleum base stocks and high load anti-wear, anti-shear and liquid moly additives for all air-cooled American big twin and water-cooled 4-cycle engines 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 Proven formula is temperature resistant and delivers optimum engine cleanliness while exceeding manufacturers requirements for engine lubrication Viscosity stable formula reduces friction and engine temperatures while providing excellent rust and anti-scuff protection; exceeds API SG/CD specification, turbo-charged certified