Castrol POWER1 Racing 4T 10W-50 is a fully synthetic advanced technology engine oil formulated for use with the latest generation high performance, high revving 4-stroke motorcycle engines. Castrol POWER1 Racing uses Race Derived Technology thanks to Castrols long and successful racing association and promises to deliver a fast flowing, high strength engine oil to reduce friction on engine internals even in the most severe race track conditions. This engine oil also contains Trizone Technology to provide the ultimate in protection and performance for your Engine, Clutch and Gearbox Castrol POWER1 Racing 4T 10W-50 engine oil is suitable for use in a wide range of 4-stroke motorcycles including on road and off road carburetted or EFI engines where SAE 10W-50, JASO MA2 or API SN specifications are recommended. Castrol POWER1 4T 10W-50 is suitable for use in bikes fitted with catalyst emissions control devices. To find the engine oil type and weight suggested for your vehicle check with your manufacturer, vehicle user manual, your local mechanic or head in-store and talk to one of our friendly team.