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Originally Posted by underDAWG
Well.... when going down hill, if situation permits I take it off gear to let the bimmer goes faster. It will gain more momentum to go further without gas.  |
Yeah, but the engine still requires gas to keep it idling. By keeping it in gear the engine is using the momentume of the car to keep the engine running. Engine braking= no fuel
Idling= requires some fuel to keep the engine running