Castrol Power 1 4T 20W-40 is an advanced, premium quality Mineral engine oil designed for the latest generation 4- stroke motorcycle engines. Its&aposPower Release Formula helps to flow fast and reduces internal engine losses to friction, giving maximum and sustained power right up to very high operating rpm. It has been tested and proven to deliver superior acceleration at the touch of the throttle. The added Castrol advantage of Trizone TechnologyTM ensures uncompromised performance protection.