That's probably correct. The transmission fluid would leak into the radiator instead.

First of all, Propylene glycol coolant doesn't need to be waterless. You can get something like Sierra if you want a PG coolant that works in an 50-50 mix. If you've changed anti-freeze in the last six or seven years, then regardless of chemistry, what you have will have a bittering agent that discourages animal consumption.

As for the environment, EG actually decays more rapidly in the environment than PG. Antifreeze shouldn't be released it into the wild, accidents excepted.

Finally, don't get to thinking that you're avant garde because you use NPG. I first encountered Evans 15 years ago, and NPG has been around for much longer. The only car manufacturer that ever seriously considered it was Cunningham, for the aborted C7 project. They never even build an engine, much a complete production car. Can you name another that is using it, including all the world's exotic and limited production brands? Why do you think that is?

Don't have the transmission lines hooked up and see no leaks.

Only driving five miles each way on surface rods most of the time, otherwise might think differently.

Half a dozen, six of another. We have no clue the perfect methods for protecting the environment, so have to do best guesses.

Been manufactured for 30 or so years, I.I.R.C.. I don't do things to be trendy or flashy like the post-modernests, I am a modernist, so my point was of logic and rational thinking.

Bet the reason it isn't used in production vehicles is the cost. With the Capitalist system, change is glacially slow or never happens, unless the Government forces them to act. This isn't always Constitutional, as in the case of the E.P.A., but does serve some good. Air pollution would be MUCH worse today if Government hadn't demanded a change, for example.

As for the exotics, not sure. Both work about equally well, so it really most likely is due to the individual, where it should be. You have your reasons for using E.G. and I have my reasons for using P.G., and neither one is truly correct. :P

I believe they don't use it because of the cost as well. That, and since it is inherently easier on the cooling system, that means that they will sell fewer cooling-related parts and/or perhaps even engines.

I've used it for many years, and have been impressed by the increased performance I saw in my gassers (VWs). I plan to drain my cooling system on my 300TD soon and put that in instead. However, I have found a cheaper solution than $36/gal... IIRC, 95% percent of Evans is the same ingredients as DOT 3, and that is only 20 bux a gallon. I am certain that is heresy on the MB forum, but I've seen that used on VW Vanagon with Great results, and that cooling system is a bit weak.

... seriously?

I'd think dot3 would disintegrate your hoses... post info and let us know how that works... start your own thread on it though...

The friend who I turned on to this stuff has done it, no discernible difference... And No melting nothing... :-D

Sorry for the thread-jack.

is dot3 flamable? i hear that waterless coolants are banned from some racing leagues because of that.

Answer
 

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http://www.peachparts.com/shopforum/3286008-post19.html

I don't use Evans Waterless Coolant, because it turns to JELLO at sub ZERO temperatures.

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http://www.peachparts.com/shopforum/3286296-post22.html

I have several local owners this winter, who now need engines.
The Waterless Coolant turned to JELLO, their engine failures where from +10° F to -20° F or lower.

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i hear that waterless coolants are banned from some racing leagues because of that.

Conventional EG coolant is flammable at elevated temperatures too.

I don't use Evans Waterless Coolant, because it turns to JELLO at sub ZERO temperatures.

No problem here. I even put some in the freezer before using it- it maintained its liquid state at -10*F. I also measured the current draw on the circulator between Evans and MB coolant, and the difference was negligible.

Having said that, the original Evans formula was more viscous, and required a special water pump.

I've not had any trouble with Evans in my VWs, but that was in OK... We could, and did get below -10, but not regularly. The real test will be with the 300TD here in CO.

Since it is an oil, I find it hard to believe it would gel like that; but then again, I've not had a diesel in cold weather either.

Antifreeze in general is banned from sanctioned motorsports, because it's very slippery when it spills on an asphalt track, and doesn't quickly air dry the way water does. That includes waterless coolants as well as standard 5050.

The flashpoint of pure glycols is around 220F, within the expected operating range of NPG. This is one reason why auto manufacturers haven't adopted it. While you can ignite a 5050 mix, it's really hard to do. If you look at your coolant plumbing, and think about ignition sources and fire, you'll realize that there's a fair amount of engineering that would have to go into the car to make it safer to run with a flammable coolant...on a Merc, the water pump nestles under the exhaust manifold, the heater lines are adjacent to the turbo, and the heater core practically sits in your lap.

Glycols aren't oils, they are alcohols.

Pure PG supercools...which means it can remain liquid below it's melting point, a helpful physical property for this application. I'm not sure whether this property changes as it picks up impurities from the cooling system.

I put Evans NPG+ in both my 300D's, starting a year ago, after seeing Ed China promote waterless on Wheeler Dealers, plus Jay Leno. My main motivation was to avoid corrosion. What is the time & effort to change a heater core in these cars? I haven't noticed higher temperatures. My son did see 105 C climbing the I-5 grade to LA on a hot day, whereas the car normally runs at 85 C, but still in the safe zone and don't recall what it did with 50/50 coolant before.

Re hose leaks, it runs with no pressure so a hose probably won't burst and lose it all while driving. If I need to work on the cooling system, I recover it and reuse. I run it thru a simple filter (wife's nylon stocking). I carry 1/2 gal in the trunk. No sense contaminating it with the water I spent so much time purging (easier in our hot, dry summers).