What is the proper way of checking engine oil level?

1. Correct answer: By using the engine’s dipstick, when the engine is cold and turned off.
2. There is no need to check the engine’s oil, but only to change it in accordance with the manufacturer’s requirements.
3. It can only be checked in a licensed garage.
4. Only before the vehicle’s annual test.

WhyOil is checked with the dipstick, on level ground, with the engine cold and off.