Castrol POWER1 Ultimate 2T 100% Synthetic Racing Motorcycle Engine Oil. This fully synthetic engine lubricant is designed for 2-stroke motorcycle engines. It meets API TC, ISO-L-EGD, and JASO FD standards. The new 5-in-1 Formula offers 5 exclusive benefits: excellent acceleration, superior protection against wear (50% more than industry limits), and smooth clutch engagement. Suitable for motorcycles and scooters.