Ummm..You no. YOu don't have a valid point. It does make a difference based on the load the actual ALternater sees depending on what is running in the car. (The load) The more power being consumed(or created) requires more energy to turn the alternator. The alternator does not comsume a "Set" amount of power from the engine..It depends on its output which varies by the need of the vehicle at any given time based on its load. SO yes...I will say it again....It does change the enrgy consumption of an Engine. No If, and's or But's about it. Fact. End of story. (Now..would you likely see that miniscule amount on yor gas bill...No...But multiply it by 1,000,000 cars on the road and there is potential for a serious waste of energy. You missed my point)