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Old 03-31-2010, 12:08 PM   #7 (permalink)
PaleMelanesian's Avatar
Join Date: Dec 2007
Location: Texas
Posts: 2,314

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

PaleFit - '09 Honda Fit Sport
Team Honda
90 day: 44.06 mpg (US)
Thanks: 605
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I regularly put 12.2 / 12.3 / 12.5 gallons into my "11.9" gallon tank. The official rating doesn't count for a little reserve at the bottom, or the extra capacity at the top if you top it off.

The tank size has no effect on anything, except the "miles to empty" and "gallons to empty" readings.

When you switch vehicles, you need to reset the gauge. Record the numbers on the old car. Adjust for the new car, drive it as needed. Record those numbers. Reset again for the first car, and for the rest of the tank, hand-calculate the total before and after the reset.

11-mile commute: 100 mpg - - - Tank: 90.2 mpg / 1191 miles
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