Castrol 06103 GO! 10W-40 4T Motorcycle Oil - 1 Quart Bottle, (Pack of 6) Formulated with Trizone technology to protect all 3 critical zones: engine, clutch and gearbox Provides maximum protection against viscosity and thermal breakdown Delivers superior engine wear protection and high film strength for high revving motorcycle engines Specialized additives help prevent against ring-sticking and build-up of harmful deposits Exceeds API SG and JASO MA-2