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Straight antifreeze ( ethylene glycol ) freezes at 8.6 degrees Fahrenheit / -13 degrees
celsius - it has to be mixed with preferably distilled water to provide proper protection
for the automotive cooling system ( freezing / boiling / and corrosion protection )
and for the temperature sensors / water pump / radiator etc to function correctly .
Ford recommends not dropping below 40 % antifreeze and not exceeding 60 %
antifreeze to prevent damage to the cooling system
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