Can 5w40 engine oil be used in summer?

[DiBrooklyn]

5w40 engine oil can be used in summer. In summer, you can use slightly thicker engine oil. Here are the methods for selecting engine oil: 1. Choose according to the oil grade: API standard classification starts with S, followed by letters E, F, G, H, G, L, M, N. The further back the letter, the higher the quality grade and the better the performance. 2. Choose according to the oil viscosity: Usually, subtract 35 from the number before W to get the minimum temperature at which the lubricating oil can be used. The low-temperature viscosity grades are 0W, 5W, 10W, 15W, 20W, 25W. The smaller the number, the better the low-temperature performance. The number "-30" indicates the viscosity at 100℃, usually divided into 20, 30, 40, 50, 60. The larger the number, the higher the viscosity.