Can I use any 50/50 cooliant or what's the best to use? One website
said to add water but the cooliants say not to add water!
50/50 is best. You can change the percentages depending on where you live and the temps. Actually coolant helps in hot weather too vs straight H2O. You have to watch what coolant you purchase, maybe why the confusion, you can buy it concentrated then mix with distilled water or buy the premixed coolant which already 50/50.
Ditto on what Tom said, 50/50 is the way to go.
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