Royal Purple Max ATF High Performance Multi-Spec Synthetic Automatic Transmission Fluid is a synthetic, high performance, automatic transmission fluid. Its high film strength helps 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 20 degree Fahrenheit reduction in fluid temperature can double the life of the transmission. Max ATF significantly reduces heat to extend the life of your transmission. Max ATF 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.