Quote:
Originally Posted by geeteezee
I suppose this may be true depending on your speed, but I find it hard to believe that I'm burning more fuel coasting at 500 rpm in neutral than I am coasting in 6th at 2500 rpm over a kilometer.
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It's quite simple actually. Modern engines when above 1500rpm or so, when off the throttle, they burn NO gas. They are effectively turned off. You are in neutral (at 700 or whatever rpm), and however little, you do burn fuel to keep the engine running. It doesn't have anything to do with speed. There is however a little bit more resistance from the engine than when in neutral and the car will be slowing down a bit faster than when in neutral.