Question 309
How should a car's oil be changed?
- With the engine cold and the vehicle level.
- With the engine hot and the vehicle level.
- With the engine hot and idling.
Show answer and explanation
Correct answer: With the engine hot and the vehicle level.
To change the oil by draining it, the car must be level and the engine must retain some warmth. It must be warm without reaching a temperature that makes handling it dangerous.