What is the difference between 5W and 0W engine oil?

[DiErin]

The difference between 5W and 0W engine oil lies in their minimum operating temperatures: 5W oil can normally start the engine at a minimum temperature of -30 degrees Celsius, while 0W oil can do so at -35 degrees Celsius. The 'W' stands for winter-grade oil suitable for all seasons, and the preceding number indicates the oil's low-temperature fluidity, identified by the minimum applicable ambient temperature. Engine oil, also known as motor lubricant, is regarded as the lifeblood of a car. It is an essential lubricant for ensuring the normal operation of the engine. Its specific functions include lubricating metal parts, reducing friction between components, dissipating the immense heat generated during engine operation, cleaning fine metal debris caused by wear, as well as providing sealing, shock absorption, and rust prevention.