How much antifreeze should I add to my car in winter? Beijing

-40 degrees Celsius. -60 degrees Celsius.

The freezing point of antifreeze in the market has several specifications, such as-15℃, -25℃, -30℃, -40℃ and so on. Generally, it is better to choose one that is lower than the lowest temperature in the region 10℃ or above. The antifreeze with low freezing point should be used in winter. The lower the freezing point, the stronger the antifreeze performance.

In general, the freezing point of antifreeze should be selected under local environmental conditions, and the lowest temperature in winter is-10℃ ~ 15℃. If the local minimum temperature is -30℃, the freezing point of antifreeze should be below -45℃. If ethylene glycol mother liquor is selected for preparation, an antifreeze with ethylene glycol concentration of 59%, freezing point of -50℃ and density of 1.0786mg/ cm3 can be prepared.

Extended data:

The lower the freezing point, the better. The basic indexes of antifreeze are freezing point and boiling point. Use low freezing point antifreeze in autumn and winter. The lower the freezing point, the stronger the antifreeze performance. In general, the freezing point of the selected antifreeze should be lower than the local minimum temperature 10℃ to prevent sudden weather changes.

Attention should be paid to anti-corrosion function. There are many kinds of antifreeze in the market, and the quality is inevitably mixed. The antifreeze produced by general manufacturers is put on the market only after the freezing point of antifreeze is determined. These products without formal inspection are often very corrosive, causing damage to the cooling system of automobiles. Some antifreeze will also corrode the perforated water tank and flow into the engine, causing major accidents. Therefore, users are advised to choose regular brand antifreeze.