Preston, Gallon, Yellow, Antifreeze/Coolant, Helps A Vehicles Engine Last Longer With Improved Extended Life Technology, Fortified With Cor-Guard Inhibitors, Prevents Corrosion, Helping A Vehicles Cooling System Run More Efficiently, Inhibitors Is Compatible With Any Antifreeze/Coolant, Regardless Of Color & Can Be Used In All Makes & Models Of Cars & Light Duty Trucks.