What is the difference between 10w-40 and 5w-40?
1 Answers
10w-40 and 5w-40 mainly have the following differences: 1. Both 5w-40 and 10w-40 are oil viscosity grades. The letter W stands for Winter, and in fact, oils with the W letter are all-season oils suitable for both winter and summer. 2. The number 40 represents the high-temperature viscosity grade of the oil. The larger the number, the stronger the high-temperature viscosity of the oil, the thicker the oil film, and the better the sealing and protective capabilities. 3. The numbers 5 and 10 represent the minimum applicable temperature of the oil, or its low-temperature fluidity. 10 indicates that the minimum applicable temperature of the oil is -25 degrees Celsius, while 5 indicates that the minimum applicable temperature of the oil is -30 degrees Celsius.