What is the difference between 5w40 and 10w40 engine oil?
1 Answers
The difference between 5w40 and 10w40 engine oil lies in their respective low-temperature resistance capabilities: 5w40 can withstand temperatures as low as -30 degrees Celsius, while 10w40 engine oil can endure temperatures down to -25 degrees Celsius. The functions of engine oil are: 1. To alleviate friction and high temperatures; 2. To cool and reduce temperature; 3. To clean and purify; 4. To absorb shocks and cushion impacts; 5. To prevent rust and corrosion. Engine oil, also known as motor lubricant, is composed of base oil and additives. The base oil is the main component of lubricating oil, determining its fundamental properties, while additives can compensate for and improve any shortcomings in the performance of the base oil.