Castrol Power 1 Racing 4T is a fully synthetic engine oil for modern, high performance 4-stroke bikes. Castrol POWER1 Racing 4T is specifically designed for bikers who love the exhilaration of riding on the limit. Riding hard puts the bike under a lot of stress leading to higher frictional losses. Castrol POWER1 Racing 4T fully synthetic oil, with Race Derived Technology is proven to stay strong and deliver acceleration in race track conditions. It has been tested and proven to deliver exceptional acceleration and power at the touch of the throttle.