Royal Purple XPR 2-C (formerly 2-Cycle TCW III Racing) is specifically formulated for use in pre-mix gasoline 2-cycle racing applications. Royal Purple XPR 2-C increases horsepower and torque and reduces heat and wear to maximize performance in high performance 2-cycle gasoline engines. XPR 2-C has a synthetic solvency that keeps spark plugs and exhaust ports clean for maximum engine efficiency. This engine cleanliness, combined with XPR 2-C's low coefficient of friction promotes increased horsepower and engine speed. Royal Purple does not recommend using with stock oil injection systems.