The websites for both of these products: water wetter, and purple ice, claim that racing engines run straight water in them. They also claim that to achieve the lowest possible temperatures, that they used only water and their product. Does this all sound reasonable to you guys? I have never run straight water in a cooling system, well just to flush it maybe, but that's it. I also realize that climates where freezing occurs would not be suitable for a straight water coolant. Thanks for you ideas.