The difference between 5w30 and 5w40

The difference between @5w30 and @5w40 About SAE: First, you must understand the oil label "SAE" before this. SAE is the English abbreviation of the American Society of Automotive Engineers, and the SAE rating represents the viscosity grade of the oil. SAE specifies 11 oil viscosity levels and is the world's standard for measuring oil viscosity. Can be divided into single-stage viscosity and multi-grade viscosity, single-stage viscosity can only be used in winter or summer, and multi-grade viscosity is common throughout the year. For example, SAE 5W and SAE 30 are single-stage viscosity; SAE 5W-40 and 10W-30 are both complex viscosity. Second, "W" means winter. The smaller the number in front of W, the lower the viscosity at low temperature, the better the low temperature fluidity, and the lower the temperature to be adapted. For example, SAE 0W adapts to the lowest temperature of -35 ° C, SAE 5W The minimum temperature to be adapted is -30 ° C, and so on. There are mainly six series: 0W, 5W, 10W, 15W, 20W, 25W. About 5w30 and 5w40: 1) 5 W-30 is better than 5 W-40, which can reduce fuel consumption, heat dissipation and noise. 2) 5W-30 is more suitable for new vehicles, and 5W-40 is more used for old vehicles; 3) 5W-40 is better than 5W-30 in high temperature, the stability is better, the fluctuation is smaller; 4) it is recommended to use 5W-40, but added 5W-30, it may cause the engine to consume excessive oil, that is, burning oil. Best Regards. CannyXia Mobile/Wechat/WhatsApp/Telegram: +86-15017090730

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