Which Oil Viscosity Grade to Use in Summer?

1 Answers
VanKira
07/30/25 7:15am
During summer, it is generally recommended to use engine oil with viscosity grades of 10W-40 or 10W-30, which are clearly labeled on the oil container. Here are some additional guidelines: 1. For summer vehicle operation, while ensuring proper lubrication, choose engine oil with lower viscosity based on the ambient temperature range, engine temperature, and actual vehicle condition. 2. For well-maintained engines with minimal wear, lower viscosity oils can be selected. Extended information: The winter/summer classification of engine oil is primarily based on viscosity grades. 1. Winter oils are categorized according to their low-temperature fluidity, with 0W, 5W, 10W, 15W, 20W, and 25W all indicating winter-grade oils. 2. Summer oils mainly reference the oil's 100°C viscosity grade, where viscosity grades of 20, 30, 40, and 50 at 100°C are classified as summer oils.
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