What does 5w30 mean for car engine oil?
1 Answers
Car engine oil 5w30 is a multi-grade viscosity, where 5 represents the ability to withstand external low temperatures of -30 degrees Celsius, with smaller numbers indicating lower usable ambient temperatures; 30 represents a kinematic viscosity standard of 30 at 100 degrees Celsius, and this number indicates the oil's high-temperature resistance performance, with larger values indicating better protective performance of the oil at high temperatures. Engine oil, also known as motor lubricant, consists of two parts: base oil and additives. The base oil is the main component of the lubricant, determining its basic properties, while the additives compensate for and improve the shortcomings of the base oil's performance, making them an essential part of the lubricant.