For the hot summer in the south, car owners can choose to replace the last two oils with larger numbers (such as 5W-30, 10W-40, etc. ) Before entering the summer, the engine oil can provide greater protection even if the engine is overheated.
For the cold and long winter in the north, when maintaining before winter, the owner can choose engine oil with smaller number before W (such as 0W-20, 0W- 16, etc.). ), so that the engine can provide better lubrication protection at low temperature cold start.
General automobile manufacturers will recommend an engine oil to automobile customers. Of course, this is a compromise, considering more factors (performance, fuel consumption, cost, etc.). ) and most users. Of course, car owners can also choose the oil that is more suitable for their car according to their own region and driving habits.
Extended data
Some car owners think that imported engine oil must be better than domestic engine oil, so they use imported engine oil in domestic cars, especially new cars. As everyone knows, this is often not worth the loss, and there will be many disadvantages. For example, most imported engine oils have low viscosity, which can't meet the requirements of domestic cars for engine oil viscosity.
In addition, the materials, thermal expansion coefficient and fit clearance of domestic engines are larger than those of imported cars, and most domestic cars do not have oil radiators. If imported engine oil is used blindly, the engine oil pressure will be low because the engine oil is too thin at normal working temperature, and even the specified working pressure can not be reached, which can not meet the needs of normal lubrication and aggravate the wear and tear of the engine.
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