What kind of oil does a car need to choose in cold weather?

Because the oil viscosity will increase after the temperature drops sharply, it may be greatly affected during cold start, and it is difficult to start and the engine will turn. Therefore, it is recommended that the owner change the oil with lower viscosity.

First of all, we must identify the quality grade of oil products. API Specific Gravity (API) classifies gasoline engine oil into eleven grades according to the quality from low to high: SA, SB, SC, SD, SE, SF, SG, SH, SJ, SL, SM. The oil products should be marked on the packaging, and we can choose the quality grade of lubricating oil for our car according to this.

After selecting the quality grade, you should also choose the appropriate viscosity grade. The Society of Automotive Engineers (SAE) is responsible for the viscosity classification of automotive lubricants. For example, 10W/40 represents multi-grade oil that is common in all seasons in engine oil. The number before "W" indicates the temperature level used in winter. The smaller the number, the lower the applicable temperature. The number after "W" represents the viscosity grade, and the larger the number, the higher the viscosity. Generally speaking, it is advisable to use engine oil with viscosity of 30 in winter and 40 in summer. Individual vehicles with poor engine conditions can appropriately increase the viscosity of engine oil.

To sum up, if you want to choose lubricating oil correctly in winter, you must try to choose oil with good low temperature performance on the premise of fully considering the quality grade of oil. It is suggested to use 10W/30 or 10W/40 engine oil in general areas in winter, and 5W/30 or 5W/40 engine oil in cold areas, so as to protect the automobile engine and make it spend the cold winter safely.