Notes on "
Antifreeze"
The MAIN purpose of "
Antifreeze" is to lower freezing temp, A side affect of the Propylene glycol & Ethylene glycol (the primary ingredients in "
Antifreeze") is that they also raise the boiling point ( the point at which the liquid becomes a gas).
This does not mean that it (antifreeze) makes a car run cooler, it means that it increases (raises) the point at which the cooling system water will boil.
It (antifreeze) does not significantly increase or improve the "convective heat transfer" capability of water (the ability of water to exchange heat). Convective Heat Transfer is whats key in getting your car to run cooler.
Here are some links to comparitive tests of "water", "water wetters" and "antifreeze mixtures". Note the running temps recorded.
redlineoil: whitePaper
turbomagazine: cooling system additives test results
hope this helps,
mike