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Old 07-02-2010, 05:03 PM   #27 (permalink)
Left Lane Ecodriver
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Join Date: Aug 2008
Location: Buffalo, NY, USA
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Prius C - '12 Toyota Prius C
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There's 16% more aero drag at 60mph than at 55mph, and you had an 11% increase in fuel consumption per mile. That sounds about right to me. You don't really hit a wall until lean burn fails at 75mpg, a little over 65mph.
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