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

[StAlexis]

0W engine oil and 5W engine oil differ in their minimum applicable temperatures: 0W can be used in environments as low as -35 degrees Celsius, while 5W can be used in environments as low as -30 degrees Celsius. Both oils have a high-temperature viscosity of 30. The number before the "W" in the oil grade represents the oil's flow viscosity under low-temperature conditions. A smaller number indicates better low-temperature fluidity of the oil, which means better protection for the engine during cold starts. The method for changing engine oil is as follows: 1. Lift the vehicle, remove the undercover, and place a container of about 10 liters under the oil drain plug. 2. Unscrew the oil drain plug, use an air gun to blow into the oil filler port for two minutes, then tighten the oil drain plug after draining and wipe it with a tissue to check for leaks. 3. Reinstall the undercover and lower the vehicle, then use a funnel to add oil into the oil filler port.