At 03:17 PM 10/9/03 -0700, Gary wrote:
>    Only reason not to use full strength is
>that it's heat capacity is lower and boiling point is
>lower.   Alcohol freezes at a much lower temperature
>than water.   Ethylene gycol is an alcohol.   Water
>absorbs more heat per gram than alcohol but it freezes
>at 0 centigrade.   Take a cup of antifreeze and put it
>in your freezer.   Maybe at minus 70 you will see
>ethylene glycol freeze.

Perhaps "freeze" isn't the best word, even though the manufacturers
themselves use it, but the chart here
<http://www.gi.alaska.edu/ScienceForum/ASF6/680.html>
is a fairly good visual of the temperature:mixture ratio at the point where
the ethylene glycol will not have the proper flow characteristics that it
has in it's liquid form.