Living in Scotland its not even an issue, tap water in the car and tap water in the belly!
I put it in my belly, just not my car :eek
you should always put distilled water in the car. Anything else causes build up and corrosion of the internal engine parts and can ultimately lead to the coolant seal retaining grooves in the end/centre plates to corrode through. This = engine rebuild, plus a new end plate - circa 3k.Are you willing to take that change for a Â£3 bottle of water?