That is what XX/XX means= Coolant%/water%.
Like I said, you don't need 70/30 unless it stays below 0 degrees F, not 0 degrees C, 0 degrees F which is -18 degrees C. Doesn't get that cold in the US. You are lowering your boiling point with 70% coolant/30% water mixture.
I only use prestone for any make/model and distilled.
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