[200q20v] Evans Coolant NPG+

Bernie Benz b.m.benz at prodigy.net
Sat Dec 1 22:35:50 EST 2001


IMO, you are looking at irrelevant thermal properties.  Conductivity and
viscosity are relatively unimportant in a good heat transfer fluid.  The
specific heat of the fluid is all important, and water is the best of all
fluids, and the cheapest.  Beware of the fat wallet syndrome.


> From: Brett Dikeman <brett at cloud9.net>
> Date: Thu, 29 Nov 2001 00:34:51 -0500
> To: quattro at audifans.com
> Cc: 200q20v at audifans.com
> Subject: [200q20v] Evans Coolant NPG+
> The Big Baby is overdue for a coolant change, and with winter
> approaching, figured now was the time to do it.  I also noticed one
> day that the gurgling noise coming from the engine has returned.
> Grrrr.
> Well, I'm wandering around the net using Google, checking into Evans
> yet again, but everything points to the stuff being just too thick.
> S-cars can't use the stuff at all, supposedly the pre-C4 cars have
> big enough passageways in the radiator.  Still, it's not
> confidence-inspiring that Evans recommends new radiators+pumps with
> the NPG.  Ah, no.
> Well, lo and behold, Evans has come out with a new version, NPG+.
> From the website(evanscooling.com):
> "A blend of non-aqueous ingredients, NPG+ retains all of the benefits
> of Evans original NPG coolant, while improving upon its thermal
> conductivity by about 32 percent and reducing its viscosity by about
> 65 percent. It is perfectly suited for the demands of any hard
> working engine, and there are no plumbing or pump changes needed to
> use this coolant."
> Any thoughts?  I remember a few listers spoke vehemently against
> using NPG, and I -think- it was because of the viscosity problem.
> Well, if they've fixed that, is it worth a go?
> Oh...and I nearly fainted at the price.  Quantities up to 3 gallons,
> $25/gal.  That's some pricey coolant.  It will last the lifetime of
> the car, and one of the toted benefits is a zero-pressure system that
> supposedly makes heater cores etc last longer; if it prevents a
> heater core meltdown, it could easily pay for itself.
> Thoughts? Opinions?  Experiences(with the NPG+ that is)?
> B
> --
> ----
> "They that give up essential liberty to obtain temporary
> safety deserve neither liberty nor safety." - Ben Franklin
> http://www.users.cloud9.net/~brett/
> http://www.users.cloud9.net/~brett/bdikeman.asc (PGP Public Key)
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