Royal Purple Max ATF is a synthetic, high performance, long life, multipurpose, automatic transmission fluid. It's more oxidation stable than other transmission fluids for a longer fluid life. Max ATF's low co-efficient of friction and high film strength help to dramatically reduce heat and wear. Automatic transmissions generate a great deal of heat and depend on the transmission fluid for cooling and protection. More than 90 percent of all automatic transmission failures are caused by overheating.* A drop of 20F in fluid temperature can double the life of the transmission. Max ATF significantly reduces heat to extend the life of your transmission and is recommended for all automatic transmissions requiring Ford Mercon® or GM Dexron® III transmission fluids. Royal Purple Max ATF Fluid is fully compatible and can be mixed with other automatic transmission fluids; however, for the best results drain or flush the current oil and then fill with Max ATF.