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Summary: When adding coolant to winterize a car, use half antifreeze and half water. Learn how to mix antifreeze with water in this free car maintenance video from a professional auto mechanic.
Greg Burchell is a retired auto mechanic. He was an auto mechanic for more than 40 yearsread more
"Now, I'm going to show you how to mix the coolant. This is an old bottle I saved, it's half full with water, we going to take a new antifreeze, it's sealed. It's very important that it's sealed. When I mix these two, that should give me the fifty, fifty percent mixture I need. One mistake, safety glasses. There we have the fifty, fifty mixture we need, we'll leave this new one here. This is good to pour in our automobile now. We're going to shake this up to make sure it's mixed real good. The jug we just poured out of, we'll fill this up with water, that's our other fifty, fifty percent. If we don't use it all, we'll get a magic marker and mark this jug "mix." That way we could store it away where no kids could get to it, and we could use it at a later time."
eHow Article: Winterizing a Car: Mixing Antifreeze With Water