Red Line Manual Transmission Lubricant is designed to provide excellent low-temperature shiftability and improved gear protection at higher temperatures. Efficiency improvements between 1-5% are typical. The synthetic base stocks used have tremendous thermal stability and provide the best film strength available. The unique combination of base stocks and additives allow Red Line MTL to carry higher loads compared to petroleum lubricants. The stability of MTL allows it to be used for extended periods. Red Line MTL is classified as a 70W80 gear lubricant satisfying the API Service requirements of GL-3 and GL-4. MTL also satisfies motor oil viscosities SAE 5W/10W/30, and the viscosity requirements for ATFs.