Question on Running Onan onboard Gen on hot days

Always leave the generator door closed. As said, it is designed to pull air through a certain pathway. The RV outer access door is not related and can be closed or open. I suppose open it will let more hot air escape from under the coach.
The Onan moves a LOT of air over its cooling fins when running, you do not need to help it. RV outer door open or closed wont matter, there is a LOT of air being pushed across the Onan motor.
Driving or parked has no effect, doesnt matter.