[200q20v] Evans Coolant NPG+

[Bernie Benz]

Brett,

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.

Bernie

> 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/
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