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Old 04-13-2009, 11:03 PM   #6 (permalink)
MetroMPG
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Join Date: Nov 2007
Location: 1000 Islands, Ontario, Canada
Posts: 22,012

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

MPGiata - '90 Mazda Miata
90 day: 53.56 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)

Even Fancier Metro - '14 Mitsubishi Mirage top spec
90 day: 57.1 mpg (US)
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Hucho's book has a chapter just about vehicle soiling. Unfortunately the commonly seen examples are trade offs between increasing drag and "cleanliness" for lack of a better word.

Some people claim vortex generators help with soiling on the back of vans/hatchbacks. The airtabs style don't seem to affect MPG one way or the other, but perhaps they may help with dust.
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