Master Mechanic, Gallon, 50/50 Extended Life Long Life Formula, Ready To Use, Convenience & Protection All In 1, A 50% Mixture Of Antifreeze & Water, Compatible For Use In All Automobiles & Light Duty Trucks, Regardless Of Make, Model, Year Or Original Antifreeze Color, Provides 150,000 Miles Or 5 Years Of Maximum Protection When A Complete Cooling System Flush & Fill Is Performed, Features A Phosphate Free & Silicate-Free Formula, Meets Astm D-3306, ASTM D-4340. Color Is Yellow.