Can Green and Red Antifreeze Be Mixed?

[EzraDella]

Green and red antifreeze cannot be mixed. Antifreeze itself is corrosive, but through special processing during production, it can prevent or delay metal corrosion to a certain extent. Different brands of antifreeze use different metal corrosion inhibitors, so antifreeze from different brands should not be mixed, and red and green antifreeze should especially not be mixed. Antifreeze, also known as coolant, has functions such as freeze protection, cooling, scale prevention, and corrosion inhibition. Antifreeze is a type of coolant containing special additives, mainly used in liquid-cooled engine cooling systems. It provides excellent performance in freeze protection in winter, boil-over prevention in summer, and year-round scale and corrosion prevention. Currently, over 95% of antifreeze used domestically and internationally is ethylene glycol-based water coolant. Compared to tap water, ethylene glycol's most notable feature is freeze protection, whereas water cannot provide this. Additionally, ethylene glycol has a high boiling point, low volatility, moderate viscosity that changes little with temperature, and good thermal stability. There are many types of antifreeze on the market, and the antifreeze used by various car manufacturers is also diverse, typically divided into red and green colors.