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Old 06-26-2008, 12:47 PM   #29 (permalink)
MetroMPG
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Join Date: Nov 2007
Location: 1000 Islands, Ontario, Canada
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Blackfly - '98 Geo Metro
Team Metro
Last 3: 70.09 mpg (US)

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90 day: 54.01 mpg (US)

Winter beater Metro - '00 Chevrolet Metro
90 day: 73.57 mpg (US)
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Hi gary -

I don't think there's a single reason why lowering helps (also note: it may not help every vehicle). But the reduced tire to wheel arch gap won't hurt, that's for sure. It's a good point.

Other contributing factors: a better "fineness" ratio; reduced frontal area (tires); diversion of air away from the "dirty" underside.

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