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Does antifreeze have an expiration date?

1 Answers

McKhloe

07/29/25 11:53pm

Automotive antifreeze does have an expiration date, typically two years, after which it should be replaced. Using inferior or expired antifreeze can cause certain corrosion to the vehicle's cooling system. Here is an introduction to antifreeze: 1. Currently, antifreeze is an aqueous solution of ethylene glycol, with a concentration ratio of approximately 30%-60%. In northeastern regions, the concentration of ethylene glycol in antifreeze should not exceed 70%, at which point the freezing point is -68 degrees Celsius. Any higher concentration will affect the cooling performance. 2. Antifreeze should be replaced every two years. If replenishment is needed, the same type should be used. If water has been added, it should be replaced before winter. 3. Antifreeze has an effective period. It not only lowers the freezing point but also raises the boiling point. Depending on the concentration, antifreeze can prevent freezing at temperatures as low as -40 degrees Celsius and reach the boiling point at 120 degrees Celsius. However, antifreeze itself has certain corrosive properties and is not recommended for year-round use. In non-cold weather, distilled water is the best option.

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