How to Distinguish Between High and Low Engine Oil Viscosity?
1 Answers
Methods to distinguish between high and low engine oil viscosity: Look at the quality grade, the higher the grade, the better. The viscosity grade of engine oil is established by the "Society of Automotive Engineers," abbreviated as "SAE" in English. The oil can is labeled with something like SAE5W40, where the number before W represents the low-temperature grade of the oil. The smaller the number, the better the low-temperature performance of the oil, such as cold starts. 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 for the engine. Engine oil consists of two parts: base oil and additives. The base oil is the main component of lubricating oil, determining its basic properties, while additives compensate for and improve the shortcomings of the base oil's performance, granting it certain new properties, making them an important part of lubricating oil.