Torco T-4SR is a 100% synthetic oil designed for highly stressed 4-stroke racing engines. T-4SR offers the ultimate in viscosity control, anti-friction, anti-wear and improved power output. It is formulated to reduce engine temperatures and provide the highest degree of protection under the most severe temperature and load conditions. A selective additive system and polymer chemistry also provides anti-oxidation, anti-foam, anti-rust and consistent clutch engagement for motorcycles with integrated transmissions. T-4SR offers the best protection for engines running at consistently high RPM, high temperatures and under extreme loads or endurance type conditions.