There are three primary types of anti-freeze for your car’s radiator cooling system:
- Ethylene Glycol/Polyethylene Glycol. Tried and true, this type of anti-freeze is still standard after almost 70 years. Modern ethylene glycol anti-freezes have several additives to protect, clean, and lubricate your cooling system.
- Non-Toxic Radiator Coolant. This anti-freeze does not contain ethylene glycol or polyethylene glycol (both acutely toxic). These engine coolants are, however, still toxic but only in larger quantities and over longer periods.
- Extended-Life Anti-Freeze. In most cases, this is simply an ethylene glycol anti-freeze with one or more carboxyl additives to prevent corrosion of the cooling system. These engine coolants should make your car radiator and cooling system last longer.
Never mix different types of engine coolant. You can damage or further reduce your car radiator’s efficiency by mixing the different types. Before you change types, thoroughly drain and flush your cooling system.
Created: February 5, 2005 / Last Updated: February 5, 2005