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Old 05-21-2008, 10:29 AM   #17 (permalink)
PaleMelanesian
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Join Date: Dec 2007
Location: Texas
Posts: 2,320

PaleCivic (retired) - '96 Honda Civic DX Sedan
90 day: 69.2 mpg (US)

PaleFit - '09 Honda Fit Sport
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90 day: 44.06 mpg (US)
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Yes. that lip is for aerodynamics. I think I read somewhere that it reduces the .cd by about .01.

Especially with an engine that big, keeping the rpm low is best for mileage. Hard to do with the gearing, though. Try Pulse & Glide. It works for me, even on the highway.

Also, for highway driving, smoothing over the upper grille will help your aerodynamics more then closing the lower one. Ideally, it would be smooth and flush. Not much air goes in there, anyway. Most of the cooling air goes in the lower opening.
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11-mile commute: 100 mpg - - - Tank: 90.2 mpg / 1191 miles

Last edited by PaleMelanesian; 05-21-2008 at 10:42 AM..
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