To more or less corroberate Ken's results, I bought two quarts from the case
he purchased last year, and used this stuff in my freshly rebuilt engine. I
have a new 190 degree thermostat, new wiring harness, new temperature sender
and NOS temp gauge, stock narrow width Mk3 radiator and stock mechanical fan.
In other words, bone stock cooling setup and new instruments so I trust the
readings I'm receiving are accurate. In all temperature conditions thus far,
including 90-95 degree ambient temps, the temperature has never risen above
just over the halfway mark on the gauge, even during extended periods at idle,
and the overflow bottle has never come into play. Even when I turn the engine
off, the temperature doesn't rise past the upper normal range on the gauge.
For hot weather climates, this stuff seems to be ideal. I'm sold.
Jeff in San Diego
1968 Spitfire Mk3 aka "Mrs. Jones"
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----- Original Message -----
To: Spit Elist
Sent: Tuesday, July 15, 2003 12:32 PM
Subject: Engine temperature
Ok, the test results are in. A 10:1 mixture of distilled water and Zerex
Racing Super Coolant does a better job of cooling than a normal 50-50 mix
anti-freeze and water. With the antifreeze / water mix, in outside temps of
85-90 degrees F, the temp gauge would hover around the 3/4 mark. If stopped
in traffic for say, 5 minutes or more, the gauge would head towards the H
mark (hot, hot, hot). With the water / RSC mixture, same outdoor temps,
normal driving - just shy of the 1/2 mark, idling in traffic - between 1/2
and 3/4 marks. Impressive.
Unfortunately, RSC does not provide protection below freezing, so it is
limited. But here in the almost desert climate of San Diego, no problem.
It may now be called Valvoline RSC, can't seem to find it under the Zerex
listing. And you have to buy a case of 6 quarts. At 1/2 quart per filling
and changing it every 2 years, that will last 24 years !! :-)
Good luck, Ken C
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