How Often Should the Antifreeze in a Car Be Replaced?
2 Answers
Small car antifreeze needs to be replaced approximately every 2 years or after driving 40,000 kilometers. For commercial vehicles, which typically have higher mileage, the replacement interval should be shorter. This is just a general guideline, and the actual replacement frequency can be adjusted based on usage conditions. The full name of antifreeze should be antifreeze coolant, meaning it is a coolant with antifreeze properties. It prevents the coolant from freezing during cold winter parking, which could otherwise cause the radiator to crack or damage the engine cylinder block or head due to expansion. Antifreeze is not just for winter use; it should be used year-round. Additionally, antifreeze prevents the coolant from solidifying at low temperatures, ensuring the car operates normally.
Last time I went for maintenance, I specifically asked the mechanic about this issue. Coolant may seem insignificant, but it's crucial for engine cooling. Generally, family cars should have it replaced every two years or after driving 40,000 kilometers, but it also depends on specific usage conditions. For someone like me who frequently takes long-distance trips, I check the freezing point and cleanliness annually. The worst scenario is finding impurities in the fluid or noticing it has turned yellow, which means it needs to be replaced ahead of schedule. Last time, my neighbor didn't change the coolant for three years, and it ended up corroding the engine radiator, causing leaks. The repair cost nearly five thousand yuan—a painful lesson indeed. Remember to choose the right type when replacing it; mixing different colors of coolant can cause chemical reactions.
