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E46 M3 (2001-2006) Engine: S54 - Max Hp: 333 hp at 7,900 rpm / 262 lb/ft at 4,900 rpm
Total Produced: 45,000+ - Years Produced: 2001 to 2006.


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Old Sat, Sep-16-2006, 02:05:36 AM   #1
m3 hal
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Default Evans NPG+ Coolant

Has anyone changed over to the Evans NPG+ Coolant? I've heard nothing but good things about this stuff. A search didn't turn up anything.
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Old Sat, Sep-16-2006, 03:35:05 AM   #2
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Quote:
Originally Posted by superH
Has anyone changed over to the Evans NPG+ Coolant? I've heard nothing but good things about this stuff. A search didn't turn up anything.
Never heard of it. For me it has always been BMW Blue
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Old Mon, Sep-18-2006, 01:54:23 PM   #3
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Anybody? Is this stuff safe to use with the S54?
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Old Mon, Sep-18-2006, 08:23:14 PM   #4
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Unless you Track the Car its pointless
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Old Mon, Sep-18-2006, 08:40:22 PM   #5
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BMW OE fill and packaged coolant is supplied by Zerex. It's critical you use an HOAT chemistry with the BMWs or you will run into major problems. You will have no need for a different coolant unless you are full out tracking the car all the time; the technology works just fine. If the BMW coolant is too expensive (and it is) than buy Zerex G-05 chemistry as it is the same HOAT BMW uses, they just have it dyed Blue for differentiation.
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Old Mon, Sep-18-2006, 08:44:20 PM   #6
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thanks for the replies; factory coolant it is
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Old Sat, Jan-10-2009, 04:31:39 AM   #7
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I know this is an old thread, but im going to have to disagree with the previous posters. I've been running evans NPG in my e36 m3 and am very satisfied. Not only does it allow your cooling system to run cooler, it also lets it operate at lower PSI, decreasing the stress on all of the hoses/clamps/radiator necks ETC. I highly recommend this stuff to anyone considering it.
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Old Sat, Jan-10-2009, 05:49:11 AM   #8
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Evans NPG is nothing but 100% propylene-glycol http://en.wikipedia.org/wiki/Propylene_glycol sold at a silly price point. You can buy the same chemical without the pretty coloring from any chemical supply house for about $6/gallon. It's used as an additive in all sorts of things mostly because it's non-toxic and prevents freezing.

As far as a cooling system running colder - not gonna happen unless your thermostat has gone bad. The thermostat regulates the coolant temperature, not the coolant. You can run lower pressure because at 100% concentration it has a high boiling point - but the cooling system WILL be less efficient. Also - at 100% concentration is has a lower heat capacity than standard ethylene-glycol (normal antifreeze) so that also lower the efficiency of your cooling system (making it MORE likely to overheat.)

Don't drink the coolaid. Just say no to evans NPG... it's snake oil slickly sold. It will work, but not as well as a standard coolant/water mix.

From their webpage:
http://www.evanscooling.com/html/tech1.htm
"Evans NPG Coolant is inhibited 100% propylene glycol."

EDIT: WRXEATR - you revived a 3 year dead thread for what reason? I think by now he changed his coolant..
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Old Sat, Jan-10-2009, 06:24:06 AM   #9
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You can achieve the same w/ water wetter/distilled water or even a drop of Palmolive (IIRC)
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Old Sat, Jan-10-2009, 07:11:30 PM   #10
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Not quite. What you don't achieve with WaterWetter and DI water is any freeze protection (and rust or corrosion protection). WaterWetter/Water mix is typically used on track because it isn't as slippery as antifreeze if there is a dump on the track. Coolant is very slippery stuff. WaterWetter is a basic surfactant (google it..) which any detergent also is (Palmolive dish detergent prolly..) The surfactant creates a better molecular mating between the liquid and the surfaces it is in contact with (increasing heat transfer when used in a cooling system.)

The NPG stuff isn't technically "wrong" (they even show charts indicating it has lower specific heat capacity than ethelyne glycol) - it simply isn't worth $30/gallon. It probably would actually work better diluted 50/50 with distilled water. As they market it - it's marketed as "magic" - and we know magic really isn't true..
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Discussing Evans NPG+ Coolant in the E46 M3 (2001-2006) Forum - Engine: S54 - Max Hp: 333 hp at 7,900 rpm / 262 lb/ft at 4,900 rpm
Total Produced: 45,000+ - Years Produced: 2001 to 2006. at BMW M3 Forum.com (E30 M3 | E36 M3 | E46 M3 | E92 M3 | F80/X)