What is the difference between 0w40 and 5w30?

[VanDamian]

5W30: The number 5 indicates that the engine oil can remain liquid at -35°C, and will solidify below -35°C. W30 means the viscosity is between 9.3-12.5. 0W40: The number 0 indicates that the engine oil can remain liquid at -40°C, and will solidify below -40°C. W40 means the viscosity range is between 12.5-16.3. More details are as follows: 1. Letter meanings: This is the grade of the engine oil. The number before W indicates low-temperature resistance. The smaller the number, the lower the low-temperature viscosity and the better the low-temperature fluidity. The number after W indicates the SAE viscosity range. The larger the number, the thicker the oil, and the higher the summer temperature it can adapt to. 2. Viscosity characteristics: Viscosity is one of the most important characteristics of engine oil. Generally, the characteristic of "oil" is that it thickens at low temperatures and thins at high temperatures, which is contrary to the actual working requirements of the engine. Additives can be used to change the nature of the oil.