Can 5w30 engine oil be used all year round?

[RemingtonLee]

5w30 engine oil can be used all year round because it maintains strong viscosity under both low and high temperatures. The method for adding 5w30 engine oil is: 1. Remove the drain plug to drain the used oil; 2. Remove the oil filter; 3. Clean the filter base and replace the oil filter element; 4. Add 5w30 engine oil; 5. Check for any oil leakage. The functions of adding 5w30 engine oil are: 1. Alleviate engine friction and high temperatures; 2. Reduce gas leakage and prevent external pollutants; 3. Prevent contact between water, air, and harmful acidic gases with engine components; 4. Buffer the pressure at the engine cylinder port; 5. Clean dirt from the surface of components.