What does 5W-30 mean?
- 5W-30 means that this is a multigrade oil. This is indicated by the two numbers separated by a "W"
- 5W - shows thickness/viscosity of the oil on a start-up - when you start the car (W - stands for Winter, this indicates oil performance under colder engine temperatures when the engine has not been running)
- 30 - shows the thickness/viscosity of the oil when the car is moving (operating temperature, when the car has been running)