What should I do if the original car coolant hasn't been changed for 8 years?

[VanJohnny]

It is recommended to replace the original car coolant promptly if it hasn't been changed for 8 years. As long as it is within the warranty period and the coolant is free of impurities and hasn't changed color, it can still be used. If impurities appear or the color changes, it indicates that the coolant has expired or oxidized, and the internal chemical components may have become ineffective, making it unusable. Car coolant does have a shelf life, generally two years, although some high-quality long-life coolants can last up to 5 years or even longer. Most family cars require coolant replacement every two years or 40,000 kilometers. This is a reference replacement cycle, and the actual replacement can be based on usage conditions. If the car is used intensively, it may need to be replaced earlier.