When putting oil in a car does the engine have to be running?
It would be a good idea not to have the car running.
Why would you keep the engine running?
no not a good idea
Your car should be cold, not running when checking you oil and putting it in.
No way, you can brake the engine if run while changing the oil.
If the engine is running while u check the oil, u will most likely get an inaccurate read from the dipstick. The engine MUST be off. It is better if the engine is warm or hot, but not running.
You shouldn't do it when the car running nor when the engine is warm/hot.