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Highest Tank ==> 72.2 Lowest Tank ==> 40.3
Averages ==> 56.2 59.9     509 15    98,751 9.11     1,758
Date Tank
MPG
Lifetime
Average
12-Month
Average
Average
Temp. ºF
Delta
MPG
Tank
Miles
Tank
Days
Total
Miles
Refill
Gallons
Total
Gallons
Notes
08/26/04     69.0   3.0                3     Picked up car
09/02/04 44.6 45.1 45.1 67.6 279.4 7          282 6.260 6 Gallons estimated based on Prius MPG
09/09/04 50.4 47.7 47.7 65.9 5.8 467.5 7          750 9.446 16 2 fuel bars remaining
09/10/04 43.4 45.3 45.3 65.0 -7.0 439.4 1       1,189 10.539 26 Complete Interstate driving
09/12/04 45.9 45.7 45.7 64.0 2.5 420.1 2       1,609 8.937 35 About 95% Interstate driving
09/17/04 49.2 46.5 46.5 63.2 3.3 490.6 5       2,100 9.977 45 About half Interstate driving and then back to normal
10/02/04 49.9 46.9 46.9 59.6 0.7 452.0 15       2,552 9.208 54 Starting to get cold - temperature affects mileage
10/11/04 48.9 47.3 47.3 55.0 -1.0 299.0 9       2,851 5.887 60 Good price on gas, refilled early
10/27/04 50.5 47.2 47.2 50.6 1.6 441.0 16       3,292 9.525 70 Might this be the last 50+ tank of the year?
11/10/04 50.0 47.4 47.4 49.5 -0.5 483.8 14       3,776 9.892 80 Last fuel bar blinking.
11/22/04 44.0 47.2 47.2 44.2 -6.0 313.9 12       4,090 7.016 87 Found the tire pressure to be very low. AARGH!
11/28/04 48.3 47.0 47.0 35.8 4.3 437.1 6       4,527 9.554 96 400 highway miles averaging ~62MPH - outbound
11/30/04 47.5 47.1 47.1 34.0 -0.8 449.5 2       4,976 9.384 106 400 highway miles averaging ~62MPH - return
12/11/04 43.1 46.7 46.7 34.3 -4.4 405.9 11       5,382 9.736 115 The avearge temp fails to capture the bitter mornings
12/22/04 40.4 46.5 46.5 22.3 -2.7 387.6 11       5,770 8.678 124 Fighting to keep the mileage above 40
01/03/05 41.8 46.0 46.0 25.7 1.4 350.4 12       6,120 9.090 133 Little bit of a warm stretch
01/15/05 40.6 45.6 45.6 23.7 -1.2 348.2 12       6,468 8.696 142 Hopefully it gets warmer from here
01/26/05 41.5 45.2 45.2 18.7 0.9 356.8 11       6,825 9.051 151 Even with colder temps I was able to improve MPG
02/03/05 46.2 45.1 45.1 25.4 4.7 381.9 8       7,207 8.952 160 Steller tank performance!
02/16/05 46.0 45.3 45.3 33.4 -0.2 401.6 13       7,609 8.127 168 This warm weather isn't going to last.
03/06/05 44.2 44.9 44.9 27.6 -1.8 363.6 18       7,972 9.470 177 Out of town for a week
03/16/05 44.6 44.9 44.9 29.3 2.4 435.0 10       8,407 9.687 187 Temperature is creeping up!  Hurray!!  :-)
03/30/05 50.0 45.1 45.1 36.4 5.8 503.4 14       8,911 10.501 198 First 50MPG tank of the season.  More to come.
04/13/05 53.0 45.6 45.6 46.5 3.0 540.3 14       9,451 9.550 207 Is this a preview of upcoming mileage?
04/30/05 51.8 45.6 45.6 47.9 -1.2 456.3 17       9,907 9.984 217 Could have gone farther, but decent gas price.
05/15/05 51.6 45.9 45.9 50.7 -0.2 518.9 15      10,426 10.044 227 Second half of the last tank and this one, A/C on
05/30/05 55.5 46.3 46.3 56.4 3.9 514.0 15      10,940 8.943 236 First ever 55MPG tank!!
06/17/05 56.0 46.6 46.6 68.6 0.5 553.5 18      11,494 10.550 247 Was fighting at the end to keep it above 56
07/07/05 58.2 47.2 47.2 70.0 2.2 612.9 20      12,107 10.000 257 Some of the time was carpooling
08/03/05 60.0 47.5 47.5 74.2 1.8 589.3 27      12,696 10.773 267 A whole month on a single tank!
08/24/05 58.5 48.0 48.0 72.0 -1.5 624.1 21      13,320 10.014 277 Some A/C
09/14/05 58.3 48.4 48.7 71.5 -0.2 573.2 21      13,893 9.834 287 Getting gas every three weeks.  I could get used to this.
09/22/05 55.4 48.4 48.8 62.3 -2.9 282.5 8      14,176 5.366 293 Decided to short-tank for fear of rising costs (Hurricane Rita)
10/15/05 55.2 48.6 49.0 60.0 -0.2 526.3 23      14,702 9.896 303 Glad I short-tanked the last one.  Prices spiked and dropped.
10/23/05 53.2 48.7 49.0 49.3 -2.0 369.9 8      15,072 7.047 310 Decided to short-tank because the price was quite attractive.
11/15/05 50.8 48.7 49.1 45.4 -2.4 500.9 23      15,573 10.431 320 Most likely the last 50+MPG tank for quite some time.
11/30/05 44.4 48.7 49.3 33.0 -6.4 427.1 15      16,000 8.830 329 Mileage dropping like a stone.
12/14/05 40.3 48.4 49.0 18.8 -4.1 362.1 14      16,362 9.270 338 Dissapointing Mileage; but accounted for with dropping temps
12/30/05 45.0 48.1 48.8 25.9 4.7 390.4 16      16,752 10.071 348 A nice turn in the weather helped with this one.
01/22/06 48.6 48.1 49.8 34.7 3.6 458.4 23      17,211 9.354 358 First refill of the new year.
02/09/06 46.8 48.1 50.2 30.7 -1.8 429.0 18      17,640 8.836 366 OEM EV Button Installed during this tank
03/03/06 48.2 48.0 50.2 25.1 1.4 455.0 22      18,095 10.372 377 MPG went up while temp went down?  EV button?
03/26/06 46.7 48.0 50.8 34.1 -1.5 425.3 23      18,520 9.409 386 Dissapointed in the mileage drop.  May be using the EV too much
04/19/06 54.5 48.2 51.3 47.3 7.8 489.1 24      19,009 8.405 395 Man how I love warm weather.
05/05/06 54.0 48.3 51.0 51.9 -0.5 553.4 16      19,563 10.789 405 5 MPG over last year at this time.
05/16/06 54.6 48.3 51.3 51.0 0.6 534.3 11      20,097 10.452 416 It rained 9 of the 11 days.   Still better than last year.
06/13/06 57.9 48.5 51.3 61.0 3.3 618.8 28      20,716 10.980 427 I was really hoping to break 60mpg with this one.
07/01/06 58.9 48.8 51.7 68.0 1.0 597.2 18      21,313 9.912 437 Used the Air conditioner on this one.  Notable hit to mileage.
07/20/06 60.5 49.1 52.2 72.0 1.6 601.0 19      21,914 9.696 446 First 150 miles was at 53.4 MPG.  Brought it up
08/02/06 61.7 49.2 51.8 78.0 1.2 574.2 13      22,488 10.782 457 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      23,128 10.326 468 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      23,814 9.555 477 Another Personal Record!   Again, temperature down, MPG up.
09/26/06 61.2 50.2 52.8 59.0 -1.8 546.0 12      24,360 8.439 486 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      24,926 11.054 497 I’m sure this will be my last 60+ tank of the year.
10/30/06 56.3 50.3 53.0 43.5 -4.5 544.7 17      25,471 9.338 506 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      25,951 7.522 513 Surprised at maintaining MPG.
11/30/06 55.3 50.5 53.4 41.4 -1.2 414.5 15      26,366 8.806 522 Getting Cold.  Got gas prior to Winter Storm.
12/15/06 50.2 50.6 53.9 27.1 -5.1 456.2 15      26,822 7.333 530 First time I used the heater this winter.
12/29/06 53.9 50.5 53.4 37.0 3.7 363.5 14      27,186 8.699 538 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      27,645 9.610 548 Nice uptick in temperatures.
01/30/07 50.1 50.5 54.4 24.5 -4.4 462.2 19      28,107 9.193 557 Cold.  Very cold.
02/08/07 44.0 50.3 54.1 5.6 -6.1 393.8 9      28,501 9.001 566 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      28,940 8.500 575 Mileage increase outpaced the temperature increase
03/06/07 52.5 50.4 54.2 27.3 0.5 410.5 12      29,351 7.897 582 Would have liked better but the snow and rain kept falling
03/23/07 57.0 50.3 54.4 38.6 4.5 495.3 17      29,846 10.343 593 Looking forward to summer weather.
04/07/07 58.3 50.6 55.3 46.5 1.3 576.6 15      30,423 8.661 601 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      30,926 9.780 611 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      31,514 9.387 621 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      32,105 9.093 630 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      32,689 10.056 640 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      33,382 10.483 650 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      34,046 9.719 660 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      34,669 10.483 670 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      35,346 10.515 681 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      36,024 10.810 692 8. Saw 67MPG for a few days then the rain came.
09/15/07 65.1 52.3 58.3 67.5 -1.6 660.8 18      36,685 9.001 701 9. Maybe I can squeak out one more 60+ tank this year.
10/02/07 68.0 52.5 58.4 67.5 2.9 612.4 17      37,298 9.500 710 10. New record!  In October!  What's up with that?
10/08/07 63.0 52.6 57.9 71.3 -5.0 564.9 6      37,862 9.384 720 11. This tank was more than 75% highway miles.
10/15/07 64.9 52.8 57.9 55.2 1.9 596.5 7      38,459 9.175 729 12. First 375 miles were highway miles.  The rest as normal.
11/02/07 59.5 52.9 58.4 53.5 -5.4 556.9 18      39,016 9.021 738 Finally dropped below 60mpg.  Temps and short trips contributed.
11/17/07 59.5 52.9 58.4 41.8 0.0 543.6 15      39,559 9.430 747 Such a high tank surprised me given average temperature.
12/04/07 55.3 53.0 58.2 32.6 -4.2 478.4 17      40,038 8.255 756 Cold temps and short trips brought it down.  Was holding high 50s.
12/15/07 53.4 53.0 58.3 23.4 -1.9 450.5 11      40,488 9.003 765 This tank was Chicagoland gas.  Next tank from Wisconsin.
01/04/08 55.8 53.0 58.6 28.8 2.4 485.0 20      40,973 9.053 774 Temp and Mileage up.  Wisconsin gas.
01/18/08 57.8 53.0 58.5 33.1 2.0 509.6 14      41,483 9.068 783 Surprised at the MPG.  Was in 58 until right at end.
01/31/08 50.1 52.9 58.5 14.7 -7.7 438.1 13      41,921 9.144 792 Temperature was a major factor as were a couple snow storms.
02/14/08 53.6 53.0 58.7 22.6 3.5 461.0 14      42,382 8.409 800 Major snow storms during this tank.  Temperatures improving.
02/27/08 51.9 53.0 59.1 19.1 -1.7 458.2 13      42,840 8.409 809 Cold weather and snow storms and short trips.
03/10/08 56.2 52.9 58.9 24.7 4.3 493.6 12      43,334 10.248 819 Hopefully the temps are on the way up.
03/25/08 59.3 53.0 59.3 34.3 3.1 571.4 15      43,905 9.132 828 So frustrated.  450 miles at 60+ MPG and then major snow storm.
04/14/08 58.8 53.1 59.8 40.7 -0.5 561.5 20      44,467 9.304 837 With higher temps I expected better mileage.  Just didn't happen.
04/28/08 66.9 53.2 59.8 51.2 8.1 601.3 14      45,068 9.175 847 1. First 60+ tank of the season.  Was at 67.8 but then bad weather.
05/19/08 62.7 53.3 60.1 49.8 -4.2 584.4 21      45,652 9.289 856 2. Was hoping to get higher but will take another 60+ mpg tank.
06/06/08 65.9 53.4 60.1 56.7 3.2 624.2 18      46,277 10.161 866 3. Relatively chilly weather so far this season
07/02/08 71.2 53.7 60.4 68.6 5.3 700.2 26      46,977 9.509 875 4. First 70+ tank!! Yippee
07/23/08 72.2 53.8 60.3 70.6 1.0 663.6 21      47,640 10.091 886 5. New personal record.
08/05/08 71.3 54.0 60.8 72.0 -0.9 492.5 13      48,133 6.500 892 6. Rotated tires, bad gas?, short tanked prior to trip.
08/10/08 63.8 54.0 60.4 69.7 -7.5 467.4 5      48,600 8.254 900 7. Almost 100% highway miles.
08/20/08 64.9 54.1 60.6 68.1 1.1 664.6 10      49,265 10.504 911 8. About 75% highway.  Disappointed with mileage.
09/08/08 71.6 54.3 61.1 68.4 6.7 693.5 19      49,958 8.874 920 9. Aimed for a new high but ended with a temp drop and rain.
09/21/08 68.3 54.4 60.9 63.7 -3.3 580.0 13      50,538 8.500 928 10. Temperature is dropping.
10/06/08 65.7 54.5 60.7 58.2 -2.6 575.2 15      51,114 9.680 938 11. Might be my last 60+ tank of the year.
10/20/08 65.0 54.6 60.8 55.7 -0.7 624.1 14      51,738 10.001 948 12. Temperature's dropping.
10/31/08 63.3 54.7 60.7 46.0 -1.7 507.4 11      52,245 8.004 956 13. Yet another 60+ tank.  Getting new tires tomorrow.
11/14/08 58.8 54.7 60.8 47.1 -4.5 538.9 14      52,784 8.587 964 Finally dropped below 60mpg.  New tires, perhaps?
12/03/08 51.4 54.6 60.2 31.0 -7.4 430.9 19      53,215 9.501 974 Dropped like a stone.  I honestly think I got bad gas.
12/13/08 50.4 54.6 60.0 20.9 -1.0 468.5 10      53,683 9.065 983 Cold and miserable weather
12/22/08 46.2 54.5 59.9 18.1 -4.2 400.8 9      54,084 8.503 992 4 winter storms in one week.  Record cold and a foot of snow.
12/27/08 55.4 54.5 59.5 23.6 9.2 496.4 5      54,581 9.857 1001 100% highway miles.  Half with strong tailwind.
01/08/09 52.4 54.6 59.8 24.8 -3.0 461.7 12      55,042 7.315 1009 Threatening to be a long cold winter
01/27/09 45.2 54.5 59.4 11.3 -7.2 342.0 19      55,384 8.067 1017 Average temp 11.3ºF.  No wonder mpg was so low.
02/07/09 49.6 54.4 59.4 18.2 4.4 393.8 11      55,778 8.501 1025 Still cold but getting warmer.
02/20/09 53.1 54.4 59.2 30.9 3.5 464.4 13      56,243 9.000 1034 Glad to see mileage back above 50.
03/06/09 52.9 54.3 59.0 28.9 -0.2 447.3 14      56,690 8.999 1043 Had a good tank going until three days of snow.
03/19/09 55.6 54.3 59.3 36.0 2.7 503.0 13      57,193 9.228 1053 Nice bump.  Good to see it heading back up.
04/01/09 56.0 54.4 59.2 38.1 0.4 490.4 13      57,683 8.695 1061 This was a very hard 56.  Kept hovering in high 55s.
04/14/09 55.5 54.3 58.7 39.3 -0.5 469.9 13      58,153 9.695 1071 Can't explain why this one isn't higher.
04/30/09 56.8 54.3 58.6 48.7 1.3 517.2 16      58,670 8.962 1080 Hopefully the start of higher mileage.
05/15/09 59.6 54.4 58.3 54.9 2.8 542.3 15      59,213 9.198 1089 Saw 60 a couple times but hit construction and bad weather.
05/29/09 60.9 54.4 58.2 57.2 1.3 517.8 14      59,730 8.503 1098 This relatively low mileage is really starting to get on my nerves.
06/18/09 61.0 54.5 58.5 59.1 0.1 557.4 20      60,288 8.500 1106 I can't believe how hard I had to work for a 61mpg tank.
06/30/09 64.1 54.6 58.4 70.2 3.1 543.4 12      60,831 9.032 1115 Was above 65 for a while but then drove interstate for a while.
07/17/09 62.5 54.6 58.1 65.5 -1.6 581.4 17      61,413 9.044 1124 Refill before Hybridfest. Weirdly cold.
07/26/09 57.4 54.6 57.8 66.6 -5.1 498.8 9      61,911 9.914 1134 Mostly highway mileage and then a trip to the dealership.
08/07/09 69.0 54.7 57.8 68.8 11.6 483.9 12      62,395 6.999 1141 Short-tanked this one in anticipation of the upcoming trip.
08/10/09 55.5 54.7 57.3 74.5 -13.5 486.7 3      62,882 8.252 1149 100% highway miles.
08/12/09 58.4 54.7 57.1 68.8 2.9 522.4 2      63,404 9.998 1159 About 95% Interstate driving
08/26/09 66.1 54.8 57.4 68.6 7.7 602.3 14      64,007 9.293 1169 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 1178 I fear the cold is coming. 
09/30/09 64.1 54.9 57.0 62.3 0.4 573.5 18      65,178 9.279 1187 Honestly surprised by the 64mpg.
10/14/09 58.8 54.9 56.6 46.9 -5.3 536.6 14      65,714 9.480 1196 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 1205 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 1215 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 1224 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 1233 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 1243 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 1252 Almost entirely highway; light snow with some wind
12/27/09 49.7 54.9 56.1 27.4 -0.3 379.4 4      69,066 6.844 1259 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 1268 So far holding its own in the cold weather.
01/21/10 55.2 54.8 55.8 24.6 3.8 486.3 13      69,976 9.012 1277 Unnaturally warm winter so far
02/01/10 53.5 54.8 56.0 23.6 -1.7 473.4 11      70,450 9.249 1286 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      70,928 9.002 1295 Hoping the temperatures go up from here.
03/02/10 56.9 54.8 56.5 29.2 1.5 495.1 14      71,423 8.354 1303 The warmer weather is coming!
03/17/10 60.4 54.8 56.6 36.7 3.5 534.2 15      71,957 10.000 1313 First 60+ tank of the year! Earliest 60+ ever!
04/01/10 60.9 54.8 56.8 43.9 0.5 547.0 15      72,504 9.093 1322 Was hovering at 60 for a while.  Final days of warm temps helped.
04/14/10 60.4 54.9 56.9 53.2 -0.5 555.6 13      73,060 9.000 1331 Was hoping for higher.  Still a full 5mpg over this time last year.
04/27/10 59.7 54.9 57.4 48.5 -0.7 556.3 13      73,616 8.999 1340 Disapointed by the drop in mileage but it got cold again.
05/12/10 63.9 55.0 57.7 50.7 4.2 573.3 15      74,189 8.700 1349 Hopefully I'll stay above 60mpg for the rest of the summer.
05/26/10 64.2 55.0 57.7 59.5 0.3 568.9 14      74,758 9.501 1358 Keeping up with two years ago when I eventually topped 70mpg.
06/09/10 63.7 55.1 57.7 65.7 -0.5 573.1 14      75,331 9.274 1368 Ended the tank with mileage-lowering interstate driving.
07/08/10 66.1 55.1 57.6 71.0 2.4 638.3 29      75,969 10.004 1378 Was out of town for two weeks.  Nice overall tank.
08/10/10 65.2 55.2 57.7 74.8 -0.9 632.3 33      76,602 9.570 1387 Didn't drive much.  Rainy weather was a factor.
08/30/10 71.6 55.3 58.3 73.7 6.4 684.9 20      77,287 9.999 1397 Best tank so far this year.  Stoked to be above 70.
09/16/10 69.1 55.4 58.5 65.2 -2.5 673.6 17      77,960 10.014 1407 Bummed that I didn't hit 70.  Hard to keep it at 69.
10/05/10 68.6 55.5 58.8 62.0 -0.5 677.0 19      78,637 9.181 1416 Pleasantly surprised by this tank's mileage
10/19/10 68.1 55.6 59.0 57.6 -0.5 597.2 14      79,234 8.699 1425 Most likely the last hi-60s tank of the year.
11/03/10 61.8 55.6 59.3 49.3 -6.3 517.1 15      79,752 8.000 1433 Weather and construction conspired on this one.  Bummer.
11/17/10 63.4 55.6 59.2 44.6 1.6 430.0 14      80,182 9.201 1442 Took a trip to the dealer.  New 12v battery.
12/07/10 55.5 55.6 59.3 31.9 -7.9 492.6 20      80,674 8.254 1451 Winter has arrived.
12/20/10 53.5 55.6 59.4 18.2 -2.0 416.8 13      81,091 7.995 1459 On par with mid-December and temperature
01/07/11 54.7 55.6 59.7 26.3 1.2 426.3 18      81,517 8.500 1467 Was a mild-weather tank
01/21/11 54.3 55.6 60.1 18.5 -0.4 464.7 14      81,982 8.131 1475 I might make the winter without dropping below 50mpg.
02/19/11 56.2 55.5 60.3 24.2 1.9 457.3 29      82,439 9.209 1484 Was out of town for two weeks.  Nice overall tank.
03/07/11 56.6 55.6 60.6 30.9 0.4 497.4 16      82,937 8.366 1493 Was above 57 but then short trips and cold weather.
03/21/11 61.0 55.6 60.5 38.0 4.4 504.0 14      83,441 9.003 1502 First 60+ tank of the year! Early like last year.
04/04/11 59.3 55.6 60.7 33.7 -1.7 525.9 14      83,967 9.266 1511 Colder temps bringing me down.
04/13/11 57.2 55.6 60.5 46.7 -2.1 513.2 9      84,480 9.035 1520 More than 75% interstate driving.
04/28/11 59.8 55.6 60.4 44.1 2.6 509.7 15      84,989 8.599 1529 Very rainy tank.
05/11/11 62.5 55.6 60.4 51.5 2.7 565.6 13      85,555 9.177 1538 Best tank so far this year.  No complaints.
05/27/11 64.3 55.7 60.3 54.9 1.8 579.7 16      86,135 9.000 1547 Nice to see the weather getting better.
06/10/11 64.9 55.7 60.5 66.6 0.6 496.5 14      86,631 7.661 1555 Short-tanked due to cheap gas.
07/05/11 68.3 55.8 60.6 65.8 3.4 594.7 25      87,226 9.499 1564 On vacation for a week which explains the long timeframe
07/24/11 63.3 55.8 60.4 75.9 -5.0 618.3 19      87,844 10.150 1574 Almost half highway.
08/09/11 68.8 55.9 61.0 75.4 5.5 706.7 16      88,551 9.663 1584 Was near 70 but then dropped.
08/23/11 67.4 56.0 61.0 69.1 -1.4 647.8 14      89,199 10.000 1594 Some highway miles and some foul weather
09/03/11 63.8 56.0 60.6 71.6 -3.6 617.8 11      89,817 10.001 1604 Second half was all interstate driving
09/12/11 59.4 56.0 60.2 65.1 -4.4 570.6 9      90,387 9.901 1614 First half was all interstate and then cold mornings
10/02/11 62.6 56.1 60.3 57.4 3.2 597.7 20      90,985 9.457 1623 Was holding mid-60s.  Then rain and interstate.
10/17/11 65.3 56.1 60.0 58.3 2.7 571.0 15      91,556 8.500 1632 Can tell that Autumn is here.
10/31/11 62.5 56.1 59.6 47.9 -2.8 543.0 14      92,099 8.600 1640 The mileage will drop from here out.
11/15/11 61.1 56.1 59.4 47.2 -1.4 502.1 15      92,601 9.003 1649 Started using the heater on the cold mornings
11/28/11 57.3 56.2 59.9 41.5 -3.8 516.7 13      93,118 9.001 1658 Sub-60 for the first time in a while
12/13/11 57.3 56.2 59.9 33.7 0.0 464.8 15      93,583 7.749 1666 I knew it was colder but didn't realize such a drop.
12/25/11 58.9 56.2 59.7 35.3 1.6 300.1 12      93,883 5.638 1672 Unseasonably warm.  Refueled prior to long trip.
12/30/11 53.7 56.1 59.5 33.1 -5.2 410.9 5      94,294 7.876 1680 Almost all highway miles
01/03/12 53.9 56.1 59.5 31.6 0.2 436.4 4      94,731 8.304 1688 Almost all highway miles
01/14/12 56.6 56.1 59.7 31.4 2.7 476.9 11      95,208 8.504 1696 Finally got the first snow of the season.
01/27/12 56.5 56.1 59.5 24.7 -0.1 452.4 13      95,660 8.498 1705 Had one snow storm but still warmer than usual.
02/15/12 57.8 56.1 59.5 30.0 1.3 472.6 19      96,133 8.313 1713 Very mild winter.
03/01/12 56.9 56.1 59.7 32.7 -0.9 490.4 15      96,623 8.702 1722 Was holding a good tank until the snow storm.
03/16/12 60.0 56.1 59.6 45.6 3.1 507.7 15      97,131 9.000 1731 First 60mpg tank of the year! New record by one day!
03/30/12 63.0 56.2 59.9 54.5 3.0 532.9 14      97,664 8.399 1739 Was pushing 65 until cold snap and rain right at the end.
04/13/12 60.3 56.2 60.0 44.7 -2.7 526.8 14      98,191 8.998 1748 Cold weather.  Had to work to get up to 60.
04/27/12 61.4 56.2 60.0 44.0 1.1 561.7 14      98,752 9.499 1758 Still lingering cold.
MPG is tracked on the left axis and temperature is tracked on the right axis.
Chart