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Old 07-20-2015, 04:51 PM   #8 (permalink)
MetroMPG
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Join Date: Nov 2007
Location: 1000 Islands, Ontario, Canada
Posts: 21,474

Blackfly - '98 Geo Metro
Team Metro
Last 3: 70.09 mpg (US)

MPGiata - '90 Mazda Miata
90 day: 52.8 mpg (US)

Winter beater Metro - '00 Chevrolet Metro
90 day: 61.98 mpg (US)

Fancy Metro - '14 Mitsubishi Mirage top spec
90 day: 58.72 mpg (US)
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Individual aero mods are generally a per cent or two improvement. Small enough that even though there's an improvement, it usually disappears in the normal variability of tank to tank MPG.

(Unless of course you're talking about a Kammback or boat tail, which is where the big gains lie.)
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