What does 5w30 oil mean?

[Leonardo]

Here is a detailed introduction to the meaning of 5w30 oil: 1. W stands for winter. The number before W is 5. The smaller the number, the better the fluidity of the oil at low temperatures, and the lower the applicable minimum temperature. 5W means it can be used at temperatures above -30°C. 2. The number after W is 30, which refers to the viscosity of the oil at 100°C. The larger the number, the higher the viscosity of the oil, the stronger the resistance to high temperatures, and the better the high-temperature protection performance. More information about 5w30 oil is as follows: 1. From the perspective of vehicle brands, 5W30 is more suitable for Japanese and Korean cars, as the engines of these two series of vehicles are more precise and have smaller gaps. If we only look at the viscosity grade, 5W30 is more suitable for colder regions and winter. 2. In addition to learning how to read the viscosity grade of oil, you should also have a general understanding of the shelf life of oil; 3. For fully synthetic oil, it should be replaced approximately every 10,000 kilometers or once a year; 4. For semi-synthetic oil, it should be replaced every 7,500 kilometers or every seven to eight months; 5. For mineral oil, the performance is not as good, so the replacement cycle should be shortened accordingly. It should be replaced every 5,000 kilometers or six months.