Quote Originally Posted by brandonl2000 View Post
May I ask why using tap water is a bad thing?
For the reason of what you see when you let tap water dry on your car's paint.. the dirt and minerals that settle out of it... under the heat and pressure of the cooling system, these minerals settle out and form hard deposits on the surfaces they come into contact with. That's with regular tap water, some people have what is called hard water in their area, which is extra full of minerals and can really make a mess out of plumbing, faucets, car paint, and cooling systems.