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The proper coolant concentration is important for providing optimal cooling properties, freeze protection, and corrosion protection.

Although engine coolant technology has changed much in the last two decades, it still performs three basic functions:

  1. In hot weather, it cools the engine.
  2. In cold weather, it keeps the coolant from freezing.
  3. In all weather, it provides corrosion protection.

Things are not as easy as they once were. In the old days, there was the standard ethylene glycol engine coolant with IAT corrosion inhibitors. Today, engine coolants are still mostly ethylene glycol, but the corrosion inhibitors’ chemical makeup differs.

See: Engine Coolant and Antifreeze Application Page for More Options >