Hello All, Perhaps some of you are in the know. Many years ago I used to work with A/C units and one I would sometines come across was a system that used pure anit-freeze. The technician at the time said to me when I asked why cars don't use pure anti-freeze, "no reason not to. In fact, pure anti-freeze is the way to go since it is the water that causes the rust and corrosion in coolant systems." I went to the mechanic the other day since i noticed rust color in my anti-freeze and asked if they could put pure anti-freeze in. The mechanic then spouted a spiel on how it is not recommended and you could over heat your car more easily, blah blah blah. It really didn't make sense to me since the boiling point of anti-freeze is higher than water (or is it?) What is your knowledge on this subject. Can someone provide the defintitive answer?