Quote:
Originally Posted by TheIVJackal
Assuming we want the car to get up to temperature as fast as possible, what would be more beneficial? Which heats up the car faster?
|
Idling will heat it up faster - as the engine would still get some fuel to burn.
If you "coast in gear" i.e. use engine braking, there's no fuel going into the engine - provided you don't have an ancient car
As PaleMelanesian already wrote, it's best (for fuel economy) to keep the engine as cold as possible.
I coast in neutral with the engine on - as Hägar can't be bump started.