The results concerning propylene glycol performance are biased on my [ and
two NASA engineers] OPINIONS. The test results convinced me that it was a
better "coolant" than others. These were specific application targets & I
was personally surprised at these findings because it was found by accident
[propylene was not initially considered]. I will leave this as it stands.
this is just F.Y. I . BRADFORD
----- Original Message -----
From: "Eric Harnish" <[EMAIL PROTECTED]>
To: "V-MAX TECH LIST" <[EMAIL PROTECTED]>
Sent: Monday, October 09, 2000 8:36 PM
Subject: Re: coolant
Antifreeze or coolant . Which is best? A Propylene Glycol or a
Ethylene Glycol based ? I will say that if you flush your system on a
motorcycle every year or 15,000 miles
there is no difference in performance of the products . I have yet to
see an engineering report that supports the fact that a Propylene Glycol
based antifreeze will transfer heat better than a Ethylene Glycol based
antifreeze . I mean an independent engineering firm, Govt., or
university test . Not statements made by distributors or manufacturers.
The bigest reason behind Propylene Glycol based antifreeze is an EPA
issue which translates to the cost of recycling & disposal . This comes
into focus when concidering the military & the trucking or fleet
industry logging millions of miles each year . With Propylene Glycol
based antifreeze & I emphasize with proper testing proceedures &
additive level maintainence , you can run it indefinitely reducing the
cost of disposal & handling . The only performance gain that I know of
is if Propylene Glycol gets into the oil system it will not destroy the
crank bearings like Ethylene Glycol will .
From a toxocology stant point Propylene Glycol is a lot safer than
Ethylene glycol . They are both toxic to humans & animals . It just
takes alot more Propylene Glycol to raise the blood's acid level to
become toxic to us .
In a nut shell if you are using a Propylene Glycol based antifreeze
thinking that it is a superior product to a Ethylene Glycol base
antifreeze , in regardes to performance in your engine , without the
using the proper testing & maintainence of the additives needed to make
the Propylene Glycol based antifreeze perform to it's potential you are
leading yourself down a path a false security .
Just my experiences
Eric H.
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