Compatible for use in all automobiles and light-duty trucks Yellow color will not change the current antifreeze color when used for topping-off Provides 150,000 miles or 5 years of maximum protection when a complete cooling system flush and fill is performed Features a phosphate-free and silicate-free formula Meets ASTM D-3306 and ASTM D-4340 Contains bittering agent denatonium benzoate.