I keep seeing that on this board, but nowhere else have i seen it. I dont run only water in any of the cars, and I have used wetting agents in the cars (with E/G coolant).
Water wetter can be mixed with coolant. if you dont live in a place that gets to cold in the winter times.. you can have a 30% coolant mix and 70% water and the water wetter additive and it will run cooler in a hot summer day then a 50/50 mix of coolant + water. I proved that on my 03 Cobra in summer days here in Las Vegas of 100 degrees plus