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The coolant level is about 1 inch below the minimum mark on my reservoir. Do I have to buy a gallon of gold antifreeze just to add a little bit or can I just put some tap water in there to bring it up? I hate to buy a whole jug just to add a little.
Location: PA to KY ('07) to IL ('09) to MS ('10) to FL ('11)
Posts: 16,182
Distilled is preferred but if you're in a pinch (which it sounds like you're not), then tap water is better than overheating. Don't sweat it being about 1" low. Just keep an eye on it. Temperature changes can cause fluctuations. If it's still 1" low in a few days, go ahead and add.