Can vehicle antifreeze be mixed and topped up?
2 Answers
Only antifreeze of the same brand can be mixed and topped up for vehicles. Different brands of antifreeze may have varying production formulations. If mixed, chemical reactions between multiple additives are likely to occur, causing the additives to become ineffective. Methods for selecting antifreeze: The basic indicators of antifreeze are the freezing point and boiling point. The market offers antifreeze with freezing points such as -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. Methods to determine if antifreeze is low: Observe the antifreeze warning light on the dashboard. If it lights up, it is likely due to low antifreeze levels, though it could also be caused by excessively high cylinder temperatures. Check the antifreeze reservoir. If the fluid level is below the minimum mark (MIN), do not continue driving; add antifreeze promptly. Check the water level markings on the antifreeze tank. The antifreeze level should normally be between the maximum and minimum marks. Whether the antifreeze is low depends on the markings. If the antifreeze is below the minimum mark, it indicates a deficiency.
I've been driving for over 20 years and found that antifreeze really can't be mixed randomly. Once I accidentally added a different color, which resulted in a clogged cooling system and the engine almost stalled due to overheating. There are different types of antifreeze, some containing ethylene glycol, others using organic acid formulas. Mixing them can cause chemical reactions that corrode the radiator and pipes. It's best to top up with the same brand and model. If you're unsure about the brand, it's simpler to drain it all and add new fluid. Regular maintenance includes checking the fluid level frequently, keeping it between the min and max lines, especially in winter and summer. Too low a level can cause freezing cracks or overheating. Safe driving comes first; this small hassle can save you from major repair costs.
