What does the 'w' in motor oil specifications mean?
1 Answers
The 'w' in motor oil specifications indicates that the oil can be used normally in winter. The number before 'w' represents the cold-start performance, with a smaller number indicating better low-temperature fluidity of the oil. The number after 'w' represents the kinematic viscosity of the oil, with a higher value indicating higher viscosity. The functions of motor oil are: 1. To alleviate friction and high temperatures; 2. To cool and reduce temperature; 3. To clean and remove impurities; 4. To dampen vibrations and cushion impacts; 5. To prevent rust and corrosion. Motor oil, also known as engine lubricating oil, is composed of base oil and additives. The base oil is the main component of lubricating oil, determining its basic properties, while additives can compensate for and improve any deficiencies in the performance of the base oil.