Hi Ron,
From: "Ronald J. Parigoris" <rparigor@suffolk.lib.ny.us>
Subject: Europa-List: Evans coolant makeup?
I have read that Evans coolant is waterless.
What I didn't know is it is Ethylene Glycol based.
Anyone know what is added to Ethylene Glycol to make Evans?
I imagine you want something that is a better conductor of heat, and some sort
of corrosion protection? Thx. Ron Parigoris >>>>>>>>>>
If you go to the NPG+ web page at
http://www.evanscooling.com/html/npgPls.htm you will see a lot of
verbiage and not much detail since Evans obviously wish to protect their
proprietary recipe. Bottom line is that the prime ingredient is
propylene glycol, other additives are possibly for anti-corrosion and/or
lubrication of water pump seals. (Quote: The NPG controlling chemical,
propylene glycol, is non-poisonous, and used in such products as
pharmaceuticals, cosmetics, and even foods and therefore NPG is already
classified as "safe".) Propylene glycol has somewhat similar properties
to ethylene glycol and Google will give you more information if you are
interested.
I changed my coolant to NPG+ at the last annual and have run it for
about 25 hours. I have seen no significant change. Cooling has not been
a problem for me in the Carolinas with ambient temps of 90+ degF (32+
degC) with 50/50 ethylene glycol, so the change may well have been
unnecessary but I thought it would give me extra insurance in severe
conditions. I have not done a careful log of my coolant temperatures
since day 1 but it is my impression that as the engine has become run
in, the coolant temperatures have dropped.
Cheers, John
N262WF, mono XS, 912S, 410 hrs
Mooresville, North Carolina
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