How to Identify Engine Oil Viscosity?

[LeJeffrey]

Engine oil viscosity is categorized into winter and summer grades. The "W" stands for winter, and the smaller the number before it, the lower the viscosity, the better the low-temperature fluidity, and the lower the applicable minimum temperature. Summer oil grades are: 20, 30, 40, 50. The larger the number, the higher the viscosity and the higher the applicable maximum temperature. More details are as follows: 1. Engine oil, also known as engine lubricant, serves to lubricate and reduce friction, assist in cooling, seal against leaks, prevent rust and corrosion, and provide shock absorption. It is often referred to as the "blood" of a car. 2. SAE winter oil viscosity grades are: 0W, 5W, 10W, 15W, 20W, 25W. The "W" stands for winter, and the smaller the number before it, the lower the low-temperature viscosity, the better the low-temperature fluidity, and the lower the applicable minimum temperature. 3. SAE summer oil viscosity grades are: 20, 30, 40, 50. The larger the number, the higher the viscosity and the higher the applicable maximum temperature. 4. SAE all-season oil viscosity grades are: 5W-20, 5W-30, 5W-40, 5W-50, 10W-20, 10W-30, 10W-40, 10W-50, 15W-20, 15W-30, 15W-40, 15W-50, 20W-20, 20W-30, 20W-40, 20W-50. The smaller the winter number (indicating a lower applicable minimum temperature) and the larger the summer number (indicating a higher applicable maximum temperature), the broader the applicable temperature range.