Torco T-4R 100% synthetic 4-Stroke racing oil provides positive clutch activation, smoother shifting, and the highest degree of anti-wear protection. It is a blend of premium Group III, Group IV, Group V, mPAO, and Ester base oils with an advanced extreme pressure additive system designed for integrated transmissions. T-4R offers unmatched shear stability to assure prolonged component life and engine performance. Torco's race-proven additive technology increases wear protection and lower operating temperatures as it reduces frictional losses between reciprocating-sliding internal engine components. 100% synthetic Group III, Group IV, Group V, mPAO, and Ester base oils. Shear stable formula maintains oil viscosity and film strength at any temperature. Provides smooth, positive clutch activation. PAO and Ester technology prevents deposit formation in highly-loaded race engines.