1 GALLON ENGINE ANTIFREEZE/COOLANT: Fully compatible with other extended life antifreeze/coolants. This item contains a bittering agent called Denatonium Benzoate. PROTECTS: Advanced formulation prevents rust & corrosion protecting all engine cooling system components DESIGNED FOR ASIAN VEHICLES: Recommended for use with Acura, Honda, Infiniti, Mitsubishi, Nissan, Subaru, and Suzuki vehicles that require a BLUE Phosphate-enhanced Organic Acid Technology (POAT) formula GUARANTEED: When installed as part of a complete flush and fill, PEAK guarantees this coolant will provide service life protection of up to 150,000 miles or 5 years. 50/50 PREDILUTED FOR QUICK TOP OFFS: Already diluted to make topping off your cooling system a breeze