I bought 5 gallons of Evans NPG years ago for a project. I put it in, drove it 23 miles to make sure the driveline was sorted out and then took the car to the body shop. That was 10 years ago. I have now carted this 5-gallon bucket full of expensive coolant from PA to CA to TX and now I'm moving back to PA. I put it on CL to see if I could sell it (cheap, too... $20) and no one seems to want it.
Now that I have a Powerstroke Van I'm thinking about just putting it in the 'stroke. The van will do some very heavy towing for part of its life (starting with several trailer loads from TX to PA) but before I dive in and trust it I wanted to get some feedback.
For those of you who don't know, Evans NPG is propylene glycol instead of ethylene glycol and you use it without water. The point is that it won't boil until something like 350 degrees. It makes sense, but at the same time I can't help but wonder if the reduced heat transfer of a coolant that doesn't use water will be too much for a big diesel tow rig. Evans' argument is that as temperature rises it doesn't matter since the coolant won't boil like traditional stuff. My concern is... which is greater - the higher boiling point, or the lower heat transfer ability? What I'm trying to figure out is, if the boiling point is higher by 20% and the loss of heat capactiy is 40%, its a losing battle. If its the other way around (where heat capacity is diminished by a factor less than the increased boiling point) then I'm golden.
Anyone use it, and what are your thoughts? Math and physics are welcome.
