Quote:
Originally Posted by shatto
July 2010 Popular Mechanics, "The Truth About Energy" issue. Page 78.
Myth: Coasting to a stop saves gas.
Truth: A car actually consumes more fuel coasting in neutral than it does in gear. That's because absent any throttle input, an engaged engine reduces the flow of fuel to the injectors.
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I find this to be far from accurate. For example at 20mph I can coast to a red light about 75yards away. To do it in DFCO mode I would need to down shift to 2nd, which would make me slow down quickly, so I wouldn't let off the throttler until I was 25yards away. So the comparison would look something like 30sec of idling vs. 15s @ 1800rpm +7s of DFCO + 3sec at 1000RPM
shatto 
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