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Normal refills occur when one fuel bar is remaining.  I do not top off the tank.
Highest Tank ==> 72.2 Lowest Tank ==> 40.3
Averages ==> 54.9 58.4     500.8 14.4 64601.7 9.2 1177.6
Date Tank
MPG		 Lifetime
Average		 12-Month
Average		 Average
Temp. ºF		 Delta
MPG		 Tank
Miles		 Tank
Days		 Total
Miles		 Refill
Gallons		 Total
Gallons		 Notes
08/26/09 66.1 54.8 57.4 68.6 7.7     602.0 14       64,007 9.293       1,169  Getting back into the groove of things.  Probably no 70+ this year.
09/12/09 63.7 54.9 57.5 62.3 -2.4     597.4 17       64,604 9.034       1,178  I fear the cold is coming.  
09/30/09 64.1 54.9 56.9 62.3 0.4 573.5 18       65,178 9.279       1,187  Honestly surprised by the 64mpg.
10/14/09 58.8 54.9 56.6 46.9 -5.3 536.0 14       65,714 9.480       1,196  Started with 150 miles of interstate, finished with cold temps.
11/02/09 59.5 55.0 56.5 48.0 0.7 554.9 19       66,269 8.602       1,205  Several days of rain but otherwise relatively warm weather.
11/06/09 50.7 54.9 55.9 44.2 -8.8 472.7 4       66,742 10.333       1,215  About 80% was interstate with staedy 15mph headwinds
11/11/09 59.5 55.0 56.2 58.7 8.8 554.0 5       67,296 8.288       1,224  Mostly interstate driving but this time with a 10mph tailwind.
11/25/09 59.0 55.0 55.8 45.2 -0.5 484.3 14       67,780 9.733       1,233  Cold weather is coming.  This will be the last respectable tank.
12/09/09 55.3 54.9 56.0 31.2 -3.7 479.3 14       68,259 9.355       1,243  Average driving; dropping temps.  Using the EBH
12/23/09 50.0 54.9 55.8 24.5 -5.3 426.8 14       68,686 9.000       1,252  Almost entirely highway; light snow with some wind
12/27/09 49.7 54.9 56.1 27.4 -0.3 379.4 4       69,065 6.844       1,259  100% highway miles, about half through a snowstorm
01/08/10 51.4 54.8 56.0 16.0 1.7 424.4 12       69,490 8.990       1,268  So far holding its own in the cold weather.
01/21/10 55.2 54.8 55.7 24.6 3.8 486.3 13       69,976 9.012       1,277  Unnaturally warm winter so far
02/01/10 53.5 54.8 56.0 23.6 -1.7 473.4 11       70,449 9.249       1,286  Surprised that I'm still holing above 50.  Could I go the whole winter?
02/16/10 55.4 54.8 56.2 23.5 1.9 477.9 15       70,927 9.002       1,295  Hoping the temperatures go up from here.
03/02/10 56.9 54.8 56.4 29.2 1.5 495.1 14       71,422 8.354       1,303  The warmer weather is coming!
MPG is tracked on the left axis and temperature is tracked on the right axis.