Does Antifreeze Have an Expiration Date?

1 Answers
HarperLee
07/29/25 9:25pm
Antifreeze does have an expiration date. Once opened, it becomes ineffective after six months, while unopened antifreeze has a shelf life of three years when stored in good conditions. The full name of antifreeze is antifreeze coolant, and its function is to prevent the coolant from freezing and cracking the radiator or damaging the engine cylinder block or head during cold winter parking. Antifreeze is categorized into: 1. Calcium chloride among inorganic substances; 2. Methanol among organic substances; 3. Ethanol; 4. Ethylene glycol; 5. Glycerol; 6. Lubricating oil. Precautions for using antifreeze include: 1. Choose antifreeze according to the specific requirements of your vehicle; 2. Try to use the same brand of antifreeze; 3. Avoid diluting it with water.
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