How Long Is the Shelf Life of Unopened Antifreeze?

[LaMalachi]

Antifreeze has a shelf life of 2-3 years when unopened. Antifreeze Replacement Cycle: Vehicle antifreeze generally needs to be replaced every 2 years or 40,000 kilometers. This is just a reference cycle. For commercial vehicles with higher mileage, the replacement interval should be shorter. Since driving conditions vary for each vehicle, the replacement should be based on actual usage. Check the antifreeze's condition—if it is insufficient, replenish it promptly. If suspended particles, sediment, or signs of deterioration or discoloration are observed, replace the antifreeze immediately and flush the system. How to Choose Antifreeze: The key indicators for antifreeze are its freezing point and boiling point. Market-available antifreeze comes in specifications such as -15°C, -25°C, -30°C, and -40°C freezing points. Generally, choose an antifreeze with a freezing point at least 10°C lower than the lowest temperature in your region.