Developed under the most severe racing conditions, Torco SR-5 offers the highest level of performance and protection for highly modified race engines. SR-5 utilizes Group IV/V synthetic base oil chemistries and additive technologies engineered to with stand extreme loads, constant severe temperatures and maximum engine revolutions. SR-5 utilizes Torco's race specific MPZ® technology which reduces frictional losses for maximizing horsepower and torque.