Pete I did not say it inhibits corrosion. I said ethylene glycol dos not cause corrosion by itself.
I'd be willing to place a wager that LAWYERS are the cause of Anti-freeze always being recommended at a 50-50 mix. This is near the max lowest freezing temp for it and liability gets very limited if that mix is advised.
I am not aware of a single boderline system that needs all the help it can get to prevent overheating! PERIOD!
The nascar race on the past Sunday had several cars running 190+ MPH at 250*F for several laps with only pure WATER in their systems. None had ill effects from that temp. Seeing 210/220* on a gauge scares the hell out of the driver... but it has only good effects on the engine.
In actual practise using 100% ethylene glycol at temps above -10*F has no ill effect and may have a positive effect on the coolant system.. <img src="/forums/images/graemlins/smile.gif" alt="" />
Big Jim <img src="/forums/images/graemlins/pfft.gif" alt="" />