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Old 06-10-2011, 11:39 AM   #4 (permalink)
nemo
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Join Date: Nov 2010
Location: US
Posts: 1,015

Chief - '06 Pontiac Grand Prix
90 day: 26.7 mpg (US)

SF1 - '12 Ford Fiesta S
90 day: 30.95 mpg (US)
Thanks: 195
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I feel your pain. My 3.8 Grand Prix just sucks fuel on acceleration. If you want to improve urban FE, air off, if your are not doing so. Also try not shifting in to neutral when coasting on some cars this may work better. Some discussion that on some cars the fuel injectors cut off under this condition saving more fuel than idling the engine. On my car I find very little difference between shifting to neutral and leavening it in drive, unless the air is on. Engine off works just worry about my old battery. Another biggie is if I can time the lights so I don't need to stop. For me about 3 well spaced light not stopped at yield about .1 MPG boost.

If you find anything that works please post it.
Good luck
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