What is the difference between 5W and 10W motor oil?
1 Answers
The main functions of motor oil are to reduce friction and wear between moving parts, and to remove sludge (one of the functions of dispersants) and varnish (cleaners) from the engine. The differences between 5W and 10W motor oil are as follows: 1. Different low-temperature performance: 5W has better low-temperature performance than 10W. If you are in a colder northern region, choose 5W or 0W. In southern regions, either 10W or 5W is suitable. 2. Different prices: 10W grade motor oil is generally cheaper than 5W. 3. Different low-temperature fluidity: The 'W' stands for winter, and the smaller the number before it, the better the low-temperature fluidity (oil thinning) of the motor oil. Therefore, 5W has better low-temperature fluidity than 10W. 4. Different protection capabilities for the engine during cold starts: 5W indicates that the motor oil can operate at a minimum temperature of -30 degrees Celsius, while 10W indicates a minimum operating temperature of -25 degrees Celsius.