Valvoline is the #1 ATF brand, and now weve taken it to the next level with Valvoline Full Synthetic Hybrid Automatic Transmission Fluid. Specifically designed for hardworking hybrids, Valvoline Full Synthetic Hybrid ATF is suitable for use in more than 95% of hybrid vehicles (not including mild hybrids, traditional CVT or DTC hybrid models). Valvoline Full Synthetic Hybrid ATF is proven to maximize transmission life, and its compatible with copper and the coatings on copper in hybrid transmission, providing greater oxidation stability, insulation for the electrical current, and increased heat transfer capabilities to protect against transmission failure.