I have used water wetter for years, and I think it is a great product. As far as
antifreeze goes, they put that on the bottle for the guys who run mostly track (
antifreeze is a no-no). I use 70% water and 30% GO5 (Ford's new coolant, it's red) and mix in the water wetter. I have had no corrosion problems, do not overheat in Texas summer heat and never freeze in the winter (but i doubt ours are as cold as yours!). If you decide to use GO5 or DexCool, be SURE to flush out ALL the green coolant, because they will turn into an obnoxious jelly if they mix.