Quote:
Originally Posted by WesK
They call it "coolant" because it not only protects against freezing but against corrosion and has better heat transfer properties than water alone. The maker of the coolant usually provides information on the best ratio to water.
BTW: Distilled water is best for mixing and it's less than $1 per gallon at grocery stores.
And yes, you can buy a tester at an auto parts store or Walmart.
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Actually it doesnt have better thermal transferal properties than water.