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Old 04-06-2009, 12:39 PM   #4 (permalink)
wagonman76
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Join Date: Jun 2008
Location: Northwest Lower Michigan
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Red Car - '89 Chevrolet Celebrity CL 4 door
Team Chevy
90 day: 36.47 mpg (US)

Winter Wagon - '89 Pontiac 6000 LE Wagon
90 day: 28.26 mpg (US)
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As a general rule, lower RPM is better for FE. But there comes a point where you start to use more fuel to maintain forward motion than if you were to use the next lower gear. It is different for each vehicle, you would have to experiment and see. With a mpguino you would be able to tell instantly.
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