Pennzoil® automatic transmission fluid has been renamed as Pennzoil® Dex/Merc ATF to highlight the applications covered. Designed to meet the stringent requirements of leading automotive transmission manufacturers, Pennzoil® Dex/Merc ATF is a high-quality automatic transmission fluid that provides consistent, reliable and smooth operation of transmission systems. It features a high oxidation resistance and shear stability, as well as dependable anti-wear and gear protection to help extend the life of transmission components. This mineral oil automatic transmission fluid is designed for historic General Motors DEXRON® III, Ford MERCON® and Allison C-4/C-3 service fill in all applications (transmissions, transfer cases, power steering systems and hydraulic systems).