[Beastmaster]

You will only see a very marginal difference in using a 50/50 DexCool/Water combination and Water Wetter.

In Arizona, I now use a 30/70 DexCool/Water mixture on my wife's H3 with Water Wetter (since I've had the temp issues with it), and I have seen a rough 10 degree difference. This is due to the fact that Water is a far better conductor of heat than coolant.

Of course, I also rarely see anything hit 0 degrees F here in Arizona either, so running a 30/70 mixture works fine.

In my H1, I use Shell Rotella ELC, which is a diesel based DexCool variant. I've seen an actual drop in operating temps doing a 30/70 water/DexCool mixture with the diesel specific Water Wetter.

In the peak of summertime, I would consistently get temps up to 230 degrees F with a 50/50 mix and running 65+MPH. Going to a 30/70 mix with Water Wetter gave me a drop down to 215 at most (normal operating temp is generally 195 to 200 degrees under normal outside temps) running at a consistent speed of 65+MPH.

So it does and will work with Dexcool. You just have to run a different water dilution mix though for optimum results.