Uhhhh...using a minimum of 25 service manuals (actually quit at 27), making
especially sure to span vehicle recommendations to include mid to late 80's
(the years of "The
>schools that I had went to"), I have concluded that you were bernd and
unscrupulously cheated. Your schools outright lied to you! All manufactures
recommended a minimum of 50/50 water/coolant mix. Oddly they all gave the
same reasons Prestone gives in their FAQs. Since you didn't follow the link
(http://www.prestone.com/faq/faq.html) to it I will paste it in here....
"Q: What is the best antifreeze/coolant concentration for a vehicle? Can I
use 100% antifreeze?
A: We recommend that you use between a 50% and 70% concentration of
antifreeze. At least 50% is necessary to give the adequate amount of
corrosion protection, as well as freeze/boilover protection. However, we do
not recommend more than 70% antifreeze. This would cause restriction of the
heat transfer capabilities, corrosion protection, and freeze protection. The
concentration of freeze/boilover protection of the antifreeze mixture can be
checked using Prestone® Test Strips or a Prestone® Coolant Tester"
To say more on this subject would be pointless...
Ed
-----Original Message-----
From: Bernd D. Ratsch <bernd@texas.net>
To: dakota-truck@buffnet.net <dakota-truck@buffnet.net>
Date: Saturday, May 13, 2000 10:23 PM
Subject: DML: RE: RE: 180 tstat not as cold as I thought!
>Uhhhh...using a minimum of 50/50 mix may cause excessive build up inside
the
>radiator. My '69 Javelin (originally my dads) has never seen anything more
>than 70/30 (water/coolant) and the radiator only had to be repaired once
>(leaking seal on top tank) but the core was almost spotless. 200+ miles
and
>still going.
>
>Manufacturers will state different mixtures for liability reasons. The
>schools that I had went to, in the late 80's, all stated that 70/30 or
60/40
>is more than adequate unless you're either in Alaska or the Sahara.
>
>- Bernd
>
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