I'd like to know if anybody has checked how much of a temperature difference there is between using glycol mixtures and using Water-Wetter. Water-Wetter can cause problems with certain brands of vinyl hose and acrylic plastics. Acrylic plastic is used for a lot of reservoirs. I'd also like to know how well a 15% to 20% glycol mixtures protect against corrosion. Since automobiles use a 50% mixture, I'd assume (quite possibly incorrectly) that the amount of corrosion inhibitors in them is adjusted for that level and that lower mixture levels may not provide enough protection.
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