Question

What is the standard anti-freeze protection of factory coolant?

Answer 1

Antifreeze, when mixed at a 50/50 ratio with water, provides excellent anti-freeze, anti-boil, and anti-corrosive properties. In extremely cold environments, the ratio for standard ethylene glycol can go as high as 70% antifreeze, 30% water. 

All coolants must be diluted with water at the proper ratios and should not be used full-strength. Full-strength antifreeze actually has a higher freeze point (meaning it would be less effective) than when mixed with water. Generally, standard ethylene glycol type antifreeze should be changed every two years or 40,000 kilometres. Even though the coolant freeze protection may test OK with a hydrometer (freeze protection only drops with extreme dilution, not with age), the additives break down over time.


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