We have an old 1994 Nissan Sentra. My mechanic says it has a slow water
leak, but we can drive it as long as it has enough water. My question is: Do
you need distilled water or can you use tap water to replace the water?
Distilled water and 50% of the proper antifreeze would be preferred. You can buy premixed 50/50 coolant at parts stores and Walmart. I would not put plain water in it.
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