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).