What is the replacement interval for car antifreeze?

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Car antifreeze should be replaced every two years or 40,000 kilometers. The full name of antifreeze should be antifreeze coolant, which means it is a coolant with antifreeze function. It can prevent the coolant from freezing and cracking the radiator or damaging the engine cylinder block or head when the car is parked in cold winter. Antifreeze is a type of 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. There are many types of automotive antifreeze, such as calcium chloride among inorganic substances, methanol, ethanol, ethylene glycol, glycerin, lubricating oil among organic substances, as well as common substances like sugar and honey in daily life, which can all serve as the base liquid for antifreeze. After adding an appropriate amount of purified soft water, it becomes the antifreeze in the general sense.