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Hi all,
I have an '03 Taurus 3 liter automatic. I have done the coasting both in gear and in neutral. What I see on my SG is about a 30% mpg gain if I coast in neutral. for example if I show 60mpg in drive, then shift to neutral, the there is a corresponding increase to about 80mpg. I have found this to generally be the case. I do not glide at over 40 mph although so far I haven't found any problems shifting back and forth at speeds below that. I do have about a two second time delay for the tranny to return to the proper pressure for whatever the current speed might be before I re-engage the throttle. Otherwise there is lag in the acceleration and then a sudden jerk when the tranny engages.
At stops, there is almost always a 30% loss in economy if left in drive rather than neutral. Ex: idles at .29gph in idle, .40gph in drive. So I have to conclude that yes there is some savings by just slipping into neutral.
JJ
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