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Old 09-16-2012, 12:22 PM   #3 (permalink)
Saskwatchian
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Join Date: Apr 2012
Location: Saskatchewan
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Eric's Explorer - '01 Ford Explorer Sport 4x4
90 day: 19.05 mpg (US)

E's V - '07 Nissan Versa SL
90 day: 33.11 mpg (US)
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Your logic looks sound to me until you throw in a cross wind.

I would guess the taper of the sides would relax with added height since air from the top is not helping fill in the void further down the sides.
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