What is the meaning of 10w30 engine oil

The "W" in 10w30 means winter, that is, the meaning of winter; 10 represents the performance of the engine oil in the cold start state. Generally speaking, the smaller the number, the higher the cold resistance of the engine oil. The easier it is to start in the season; and 30 means that the kinematic viscosity of the vehicle is between 9.3mm2/s--12.5mm2/s per 100 degrees Celsius).

With the continuous development, the classification of engine oils in the current market is also increasing. The existing engine oils are basically classified according to the SAE method. Among the single-grade engine oils, there are 6 types of oil for winter and 4 types of oil for summer. . The general engine oil starts with S grade, and the letter after S means the higher the grade, in short, the better the performance. Moreover, when gasoline is marked, SAE30 or SAE0W-40 will be marked on the outer packaging; SAE30 means that the oil has a single-grade viscosity, and the number indicates the temperature level but does not directly represent the operating temperature; SAE0W-40 means that the oil is multi-grade viscosity.