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Normal refills occur when one fuel bar is remaining.  I do not top off the tank.
Highest Tank ==> 72.20 Lowest Tank ==>  40.30
Averages ==> 54.4 60.1     500 15 50538 9.28 928.20
Date Tank
MPG		 Lifetime
Average		 12-Month
Average		 Average
Temp. ºF		 Delta
MPG		 Tank
Miles		 Tank
Days		 Total
Miles		 Refill
Gallons		 Total
Gallons		 Notes
08/02/06 61.7 49.2 51.8 78.0 1.2 574.2 13.0 22490.8 10.8 457.2 New personal record; I suspect 10.782 is from stretching the bladder
08/21/06 62.1 49.5 52.1 70.0 0.4 640.0 19.0 23130.8 10.3 467.5 New personal record! I triple-checked that temperature drop.
09/14/06 63.0 49.9 53.0 66.8 0.9 686.2 24.0 23817.0 9.6 477.1 Another Personal Record!   Again, temperature down, MPG up.
09/26/06 61.2 50.2 52.8 59.0 -1.8 546.0 12.0 24363.0 8.4 485.5 The last bip was blinking but only needed 8.5 gallons.
10/13/06 60.8 50.2 52.7 52.5 -0.4 566.1 17.0 24929.1 11.1 496.6 I’m sure this will be my last 60+ tank of the year.
10/30/06 56.3 50.4 53.0 43.5 -4.5 544.7 17.0 25473.8 9.3 505.9 First 1/2 Interstate.  Severe temp drop and very windy
11/15/06 56.5 50.5 53.4 41.6 0.2 480.3 16.0 25954.1 7.5 513.4 Surprised at maintaining MPG.
11/30/06 55.3 50.5 53.4 41.4 -1.2 414.5 15.0 26368.6 8.8 522.2 Getting Cold.  Got gas prior to Winter Storm.
12/15/06 50.2 50.7 53.9 27.1 -5.1 456.2 15.0 26824.8 7.3 529.6 First time I used the heater this winter.
12/29/06 53.9 50.5 53.4 37.0 3.7 363.5 14.0 27188.3 8.7 538.3 First full tank with a blocked grill.  Temperature increase.
01/11/07 54.5 50.5 54.6 37.8 0.6 459.4 13.0 27647.7 9.6 547.9 Nice uptick in temperatures.
01/30/07 50.1 50.5 54.4 24.5 -4.4 462.2 19.0 28109.9 9.2 557.1 Cold.  Very cold.
02/08/07 44.0 50.4 54.1 5.6 -6.1 393.8 9.0 28503.7 9.0 566.1 Flat tire, dead battery, record cold; I shouldn't complain.
02/22/07 52.0 50.4 54.1 16.3 8.0 439.2 14.0 28942.9 8.5 574.6 Mileage increase outpaced the temperature increase
03/06/07 52.5 50.4 54.2 27.3 0.5 410.5 12.0 29353.4 7.9 582.5 Would have liked better but the snow and rain kept falling
03/23/07 57.0 50.4 54.4 38.6 4.5 495.3 17.0 29848.7 10.3 592.8 Looking forward to summer weather.
04/07/07 58.3 50.6 55.3 46.5 1.3 576.6 15.0 30425.3 8.7 601.5 Got off to a warm start then turned cold again.
04/22/07 57.5 50.6 55.1 41.9 -0.8 503.0 15.0 30928.3 9.8 611.3 Had another cold snap.  Hopefully the last of the season.
05/02/07 61.2 50.8 55.0 54.2 3.7 587.9 10.0 31516.2 9.4 620.6 1. First 60+ tank of the season! I think I'll start counting them.
05/15/07 62.6 51.0 55.7 58.9 1.4 591.5 13.0 32107.7 9.1 629.7 2. Almost a record tank, but last-minute rain ruined it. 
05/31/07 64.1 51.1 56.0 64.4 1.5 583.7 16.0 32691.4 10.1 639.8 3. New personal record.  56 MPG here I come!
06/16/07 66.0 51.3 56.7 69.8 1.9 693.5 16.0 33384.9 10.5 650.3 4. New record. Kept dropping below 66 had to fight to keep it up.
07/02/07 66.0 51.6 57.2 70.3 0.0 664.1 16.0 34049.0 9.7 660.0 5. Was hoping to exceed 66.0.  Hopefully next time.
07/20/07 63.7 51.7 57.1 73.8 -2.3 622.4 18.0 34671.4 10.5 670.5 6. It was a bad tank anyway ending with 110 miles of highway.
08/08/07 66.7 51.9 57.3 75.4 3.0 676.8 19.0 35348.2 10.5 681.0 7. New Record!  First 110 miles was highway @ ~56MPG.
08/28/07 66.7 52.1 57.7 71.3 0.0 678.8 20.0 36027.0 10.8 691.8 8. Saw 67MPG for a few days then the rain came.
09/15/07 65.1 52.4 58.3 67.5 -1.6 660.8 18.0 36687.8 9.0 700.8 9. Maybe I can squeak out one more 60+ tank this year.
MPG is tracked on the left axis and temperature is tracked on the right axis.