Is It Normal for Antifreeze to Decrease in Winter?
2 Answers
Antifreeze will gradually decrease with the mileage of the car in winter, which is a normal phenomenon. Like engine oil, it also needs to be replenished regularly. If the antifreeze is consumed quickly, the reasons may include the following four aspects: 1. Unreasonable design of the cooling system; 2. Leakage: Generally, traces can be seen at the leakage point; 3. Poor circulation leading to rapid consumption: It is recommended to have a professional mechanic inspect it. Note that when adding coolant, it should be done after the engine temperature has cooled down. During the process, start the engine and gently press the accelerator to expel air from the system. Add the coolant slowly, and if necessary, follow the instructions to vent the cooling system; 4. Coolant entering the cylinder and being burned or entering the oil pan.
A slight decrease in antifreeze during winter is normal due to thermal expansion and contraction. I was also concerned about this when I first bought my car, but a mechanic later explained to me that sealing rings may contract slightly in low temperatures, especially in older cars which are more prone to minor leaks. However, if you notice the level dropping unusually fast—say, a significant decrease within half a month—then it's time to be alert. I once experienced this myself and found out it was due to aging coolant tank connectors leaking. Spending a little over a hundred to replace the part fixed the issue. It's advisable to check the antifreeze reservoir monthly when the engine is cold, ensuring the level stays around the midpoint. For drivers in northern regions, it's best to test the freezing point before winter sets in. Antifreeze rated for -25°C is more reliable to prevent freezing and breakdowns on the road.
