200q20v Digest, Vol 32, Issue 18

[c1j1miller at aol.com]

http://www.motorage.com/motorage/data/articlestandard/motorage/162005/156
227/article.pdf

discusses the different coolant technologies.  The article says all 
coolants can be mixed, which I disagree with.  A friend of mine is a 
chemist who did a study on various coolants; additive packages vary 
widely and are considered trade secrets, and some coolants do react and 
form a sludgy mixture.

I stay away from extended life coolants; it's pretty cheap and easy to 
stick with a pentosin or similar coolant.

---
Chris Miller, Bolton, MA  c1j1miller at aol.com
'97 Audi A4tq, '91 coupe q, '85 4ksq, '81 VW Scirocco
'91 200q20v site ==> http://members.aol.com/c1j1miller/welcome.html

-----Original Message-----
Date: Tue, 13 Jun 2006 12:51:38 EDT
From: TooManyAudis at aol.com
Subject: Re: Coolant Color

In a message dated 6/13/2006 12:45:19 P.M. Eastern Standard Time,
kneale at coslink.net writes:

That's  different than the green stuff the original poster reported 
finding
in his  car.  My understanding is that the orange extended life stuff  
should
only be used if you do a complete flush of all previous products  from 
the
system.  Otherwise, it mixes with other types of antifreeze  to form 
plugs.


Yes, but, the discussion has also centered around the question as to  
whether
any antifreeze other than Pentosin is acceptable.  If the Prestone  
Extended
Life (orange color) is not acceptable, I'd like to know why.

thanks,

Tom

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