Hy-Per Lube Super Coolant contains special wetting agents that reduce the surface tension of the coolant mixture allowing it to more deeply penetrate the metal surfaces of the heat transfer areas of the cooling system. This allows your cooling system to dissipate more heat more efficiently, reducing coolant and engine temperatures up to 20 degree Fahrenheit and will prevent overheating. Hyper lube Super Coolant also provides complete protection from rust, corrosion and electrolysis and also lubricates water pump seals. Super Coolant is compatible with all types of anti-freeze and can be used in gasoline and diesel engines. Directions: Add to your cooling system. One bottle treats 12 to 20 quart systems.