Does Car Antifreeze Have an Expiration Date?
2 Answers
Antifreeze has a validity period of two years. Expired antifreeze can cause cylinder corrosion, and in severe cases, it may even cause serious damage to the engine. 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 longer mileage, the replacement cycle is shorter. Since the driving conditions of each vehicle are different, the replacement should be chosen based on actual usage. Check the antifreeze's condition; if it is found to be insufficient, replenish it promptly. If suspended matter, sediment, or signs of deterioration or discoloration are found in the antifreeze, replace it immediately and clean the system. Function of antifreeze: Antifreeze is a coolant containing special additives, mainly used in liquid-cooled engine cooling systems. It has excellent properties such as preventing freezing in winter, boiling in summer, and protecting against scale and corrosion all year round.
As an experienced driver, I've encountered several issues caused by expired antifreeze. Antifreeze does have a shelf life, usually marked on the bottle, typically ranging from 2 to 5 years depending on the type. For example, organic acid-based ones may last longer, while inorganic acid-based ones might only last two or three years. After expiration, the acidity increases, corroding the radiator and water pump. In winter, reduced antifreeze capability can cause the entire cooling system to freeze and crack, while in summer it's prone to boiling, leading to engine overheating. I recommend checking the antifreeze condition every two years, looking for color fading or sediment. Mixing different brands or colors can shorten its lifespan more easily. Regular replacement saves hassle and avoids expensive repairs - safety first, after all.
