Can Antifreeze Be Mixed?
2 Answers
Antifreeze should not be mixed and must be of the same brand. Different brands of antifreeze have varying production formulas, and mixing them may cause chemical reactions between multiple additives, rendering them ineffective. The basic indicators of antifreeze are its freezing point and boiling point. On the market, antifreeze comes in several specifications with freezing points of -15°C, -25°C, -30°C, and -40°C. Generally, it is advisable to choose one that is at least 10°C lower than the lowest temperature in your region. The main components of antifreeze are: 50% pure water, 40% methanol, and 10% other substances. Antifreeze is generally categorized into three types: ethanol-water, glycerin-water, and ethylene glycol-water.
I see your question, and mixing coolant is really something to be cautious about. Having driven for over a decade, I've seen many friends casually add different types of fluids, only to end up with rust deposits or clogged pipes in the cooling system, causing erratic water temperatures and accelerated engine wear. Each brand's coolant has a different formulation—some contain special additives to prevent corrosion, and mixing them might cause chemical reactions that render them ineffective. It's best to stick with the same brand and type of fluid consistently, regularly checking levels to ensure they don't get too low. When replacing the fluid, follow the manual's recommended intervals and avoid mixing different brands. Saving a little money now could lead to costly engine repairs later. Develop good habits by checking the radiator and hoses to prevent problems before they arise.
