Quote:
Originally Posted by Old Mechanic
That size engine probably burns .4 gallon (per hour) of fuel coasting. Multiply your speed by 2.5 to get your mileage and you can see how much it can help. Coasting at 40 MPH is 100 MPG. Even for a fairly short distance glides that can add up quickly. If you have any hills see if you can coast the downhill grades as much as possible.
regards
Mech
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This info is good. My 2.0 V6 Honda automatic uses .43 g/h at idle (SG II). That is the reason I've found that the fuel cutoff with coasting in gear works better for me and my driving (about 26 miles one way, mostly highway).
Joggernot