Castrol Power 1 4T 10W-40 is a high-quality oil developed for the latest generation 4-stroke motorcycle engines. It features a Power Release Formula designed to allow your motorcycle to deliver maximum power and sustained performance up to high operating RPMs, offering an advantage over other motorcycle engine oils. The exclusive Trizone technology ensures uncompromised protection for the engine, gearbox, and clutch. The Power Release Formula reduces internal engine friction while maintaining excellent oil bath friction performance, ensuring efficient power transfer to the wheel. Approved Stockist, No Leak Guarantee, Opie Knows Oil.