Quote Originally Posted by yaofeng View Post
I have never used anything but tap water for my cars. I don't eve drink spring water myself, let alone distilled. They are not getting it. Are cars more important than me? The mineral content in tap water is miniscule. The potential of gumming up the car cooling system is almost nil.
I've drained coolant from cars that had tap water in there. There were tons of particles floating around that were caused by the water. I use distilled water in all my cars and everytime I drain the coolant it comes out the same color as the day I mixed it.