FAQ Peak Antifreeze

General Questions ...

What is the shelf life of antifreeze?
If the product is still in the original sealed container, then it has a shelf life of many years. We recommend that antifreeze be used within one year of purchase.

Why is it important to mix antifreeze with water?
Antifreeze contains chemicals that protect your engine against rust and corrosion, as well as freeze-up and boil over protection. Water is required to activate the chemicals in the inhibitor package. Furthermore, adding water to antifreeze actually increases the freeze-up and boil over protection provided. For example, a mix of 40% antifreeze and 60% water provides freeze-up protection down to -23°C and boil over protection up to 126°C. In comparison, a mix of 70% antifreeze and 30% water provides freeze-up protection down to -52°C and boil over protection up to 132°C. However, we do not recommend adding more than 70% antifreeze. This would limit the corrosion and freeze up protection and heat transfer capabilities of the antifreeze.

Can I mix ordinary tap water with antifreeze?
Yes, tap water is commonly used for mixing with antifreeze, however, deionized water or distilled water is preferred. Do not use water softened with salts to mix with antifreeze.

What is the proper mixture of antifreeze to water for adequate freeze
protection in my area?

While temperatures and climates vary, most vehicles can use our
conventional antifreeze protection chart below or click here to view the
Peak Antifreeze Reference Chart

antifreeze protection chart