What is the freezing point of antifreeze that can be used?

[AuroraLee]

Antifreeze with freezing points of -15°C, -25°C, -30°C, and -40°C can be used. When selecting antifreeze, it is generally advisable to choose one with a freezing point at least 10°C lower than the lowest temperature in your region. Can different antifreeze brands be mixed: You must use antifreeze from the same brand. Different brands of antifreeze may have varying production formulas, and mixing them could lead to chemical reactions between additives, rendering them ineffective. How to determine if antifreeze is low: Observe the antifreeze warning light on the dashboard. If it lights up, it may indicate low antifreeze levels, though it could also be due to excessively high engine temperature. Check the antifreeze reservoir. If the fluid level is below the minimum mark (MIN), do not continue driving and promptly add antifreeze. Check the water level scale on the antifreeze bottle. The antifreeze level should normally be between the maximum and minimum marks. If it is below the minimum mark, it indicates a shortage of antifreeze.