Fully synthetic 4-stroke engine oil for modern high-performance sports bikes that increases engine acceleration and power right up to max rpm. Its Race Derived Technology based on Castrol’s racing history and testing experience ensures maximum engine performance, without sacrificing engine durability, thus giving a significant benefit over other types of engine oils. Power 1 Racing 4T 10W-40’s formula employs the very latest “Trizone Technology” for 4-stroke motorcycles, so as to give optimum protection of the engine, clutch and gears even under the most arduous riding conditions including sustained operation at high rpm.