Nulon Premium Mineral Automatic Transmission Fluid (NDEX3) is a mineral based Automatic Transmission Fluid (ATF) for use in many transmissions specifying General Motors Dexron® III and Ford Mercon® fluids. Nulon Premium Mineral Automatic Transmission Fluid provides excellent wear protection, smoother shifting and is suitable as a top up with other Dexron® and Mercon® fluids.