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Fuel log graph
Efficiency log for: Ick - 1997 Buick Lesabre
  • Lifetime Fuel Economy: 22.5 mpg (US), 10.5 L/100 km, 27 mpg (Imp)
  • 90-day Fuel Economy: 22.1 mpg (US), 10.7 L/100 km, 26.5 mpg (Imp)
  • 3-tank Fuel Economy: 22.7 mpg (US), 10.4 L/100 km, 27.2 mpg (Imp)
  • EPA Combined Rating / % over rating: 20 mpg (US) / 10.3% (based on 90-day fuel economy)
  • Total fills: 35
  • Average cost per gal/L: $2.91 per gal (US); $0.00 per L (price data entered for 35 fill/s)
  • Average cost per fill: $37.41
  • Average distance cost: $0.13 per mi. / $0.08 per km
  • Total fuel used: 449.35 gal (US), 1701 L
  • Total distance traveled: 10093 mi. / 16243.1 km
  • Total cost: $1,309.36
  • Total fuel saved vs. EPA: 55.3 gal. (US) / 209.3 L
  • Total saved: $160.92 (based on avg. cost per gal./L)
  • Average tank distance: 288.4 mi. / 464.1 km
Fill date Distance Fill amount Price Fuel Economy Details
2012-01-07 315.1 mi
507.1 km
14.213 gal (US)
11.83 gal (Imp)
53.8 L
478.98 kWh
$3.249
($46.18 total for this fill)
22.17 mpg (US)
26.64 mpg (Imp)
10.61 L/100 km
4.51 gal (US)/100 mi
1520.09 Wh/mi
2011-12-19 310.2 mi
499.22 km
13.575 gal (US)
11.3 gal (Imp)
51.39 L
457.48 kWh
$2.96
($40.18 total for this fill)
22.85 mpg (US)
27.45 mpg (Imp)
10.29 L/100 km
4.38 gal (US)/100 mi
1474.79 Wh/mi
2011-12-10 277.6 mi
446.75 km
12.035 gal (US)
10.02 gal (Imp)
45.56 L
405.58 kWh
$3.139
($37.78 total for this fill)
23.07 mpg (US)
27.7 mpg (Imp)
10.2 L/100 km
4.34 gal (US)/100 mi
1461.02 Wh/mi
2011-11-21 319.4 mi
514.02 km
14.393 gal (US)
11.98 gal (Imp)
54.48 L
485.04 kWh
$3.099
($44.6 total for this fill)
22.19 mpg (US)
26.66 mpg (Imp)
10.6 L/100 km
4.51 gal (US)/100 mi
1518.6 Wh/mi
2011-10-26 283.6 mi
456.41 km
14.067 gal (US)
11.71 gal (Imp)
53.25 L
474.06 kWh
$3.199
($45 total for this fill)
20.16 mpg (US)
24.22 mpg (Imp)
11.67 L/100 km
4.96 gal (US)/100 mi
1671.58 Wh/mi
Heavy trailer towing
2011-09-19 328.7 mi
528.99 km
13.09 gal (US)
10.9 gal (Imp)
49.55 L
441.13 kWh
$3.369
($44.1 total for this fill)
25.11 mpg (US)
30.16 mpg (Imp)
9.37 L/100 km
3.98 gal (US)/100 mi
1342.04 Wh/mi
2011-08-19 281.6 mi
453.19 km
11.599 gal (US)
9.66 gal (Imp)
43.91 L
390.89 kWh
$3.499
($40.58 total for this fill)
24.28 mpg (US)
29.15 mpg (Imp)
9.69 L/100 km
4.12 gal (US)/100 mi
1388.1 Wh/mi
2011-08-08 338.5 mi
544.76 km
14.78 gal (US)
12.31 gal (Imp)
55.95 L
498.09 kWh
$3.539
($52.31 total for this fill)
22.9 mpg (US)
27.5 mpg (Imp)
10.27 L/100 km
4.37 gal (US)/100 mi
1471.46 Wh/mi
2011-06-21 258.6 mi
416.18 km
11.77 gal (US)
9.8 gal (Imp)
44.55 L
396.65 kWh
$3.469
($40.83 total for this fill)
21.97 mpg (US)
26.39 mpg (Imp)
10.7 L/100 km
4.55 gal (US)/100 mi
1533.84 Wh/mi
2011-05-27 312.7 mi
503.24 km
14.77 gal (US)
12.3 gal (Imp)
55.91 L
497.75 kWh
$3.699
($54.63 total for this fill)
21.17 mpg (US)
25.42 mpg (Imp)
11.11 L/100 km
4.72 gal (US)/100 mi
1591.78 Wh/mi
2011-05-10 298.8 mi
480.87 km
13.16 gal (US)
10.96 gal (Imp)
49.82 L
443.49 kWh
$3.879
($51.05 total for this fill)
22.71 mpg (US)
27.26 mpg (Imp)
10.36 L/100 km
4.4 gal (US)/100 mi
1484.24 Wh/mi
Not much since March.
2011-03-25 319.7 mi
514.51 km
14.49 gal (US)
12.07 gal (Imp)
54.85 L
488.31 kWh
$3.359
($48.67 total for this fill)
22.06 mpg (US)
26.49 mpg (Imp)
10.66 L/100 km
4.53 gal (US)/100 mi
1527.4 Wh/mi
2011-03-11 273.5 mi
440.16 km
11.79 gal (US)
9.82 gal (Imp)
44.63 L
397.32 kWh
$3.369
($39.72 total for this fill)
23.2 mpg (US)
27.85 mpg (Imp)
10.14 L/100 km
4.31 gal (US)/100 mi
1452.72 Wh/mi
2011-02-13 224 mi
360.49 km
11.98 gal (US)
9.98 gal (Imp)
45.35 L
403.73 kWh
$3.009
($36.05 total for this fill)
18.7 mpg (US)
22.44 mpg (Imp)
12.58 L/100 km
5.35 gal (US)/100 mi
1802.37 Wh/mi
80 miles towing a 5x8 enclosed trailer otherwise commuting miles.
2011-02-07 226.7 mi
364.84 km
11.29 gal (US)
9.4 gal (Imp)
42.74 L
380.47 kWh
$2.919
($32.96 total for this fill)
20.08 mpg (US)
24.12 mpg (Imp)
11.71 L/100 km
4.98 gal (US)/100 mi
1678.3 Wh/mi
2011-01-28 234 mi
376.59 km
10.67 gal (US)
8.88 gal (Imp)
40.39 L
359.58 kWh
$2.849
($30.4 total for this fill)
21.93 mpg (US)
26.35 mpg (Imp)
10.73 L/100 km
4.56 gal (US)/100 mi
1536.67 Wh/mi
2011-01-21 290 mi
466.71 km
14.53 gal (US)
12.1 gal (Imp)
55 L
489.66 kWh
$2.929
($42.56 total for this fill)
19.96 mpg (US)
23.97 mpg (Imp)
11.78 L/100 km
5.01 gal (US)/100 mi
1688.48 Wh/mi
2010-12-14 291.3 mi
468.8 km
14.35 gal (US)
11.95 gal (Imp)
54.32 L
483.6 kWh
$2.689
($38.59 total for this fill)
20.3 mpg (US)
24.38 mpg (Imp)
11.59 L/100 km
4.93 gal (US)/100 mi
1660.14 Wh/mi
2010-11-23 282.1 mi
454 km
12.54 gal (US)
10.44 gal (Imp)
47.47 L
422.6 kWh
$2.599
($32.59 total for this fill)
22.5 mpg (US)
27.02 mpg (Imp)
10.46 L/100 km
4.45 gal (US)/100 mi
1498.05 Wh/mi
2010-11-15 314.5 mi
506.14 km
14.62 gal (US)
12.17 gal (Imp)
55.34 L
492.69 kWh
$2.739
($40.04 total for this fill)
21.51 mpg (US)
25.84 mpg (Imp)
10.93 L/100 km
4.65 gal (US)/100 mi
1566.58 Wh/mi
2010-11-04 265.3 mi
426.96 km
12.26 gal (US)
10.21 gal (Imp)
46.41 L
413.16 kWh
$2.629
($32.23 total for this fill)
21.64 mpg (US)
25.98 mpg (Imp)
10.87 L/100 km
4.62 gal (US)/100 mi
1557.33 Wh/mi
Colder weather starting to set in. Going to try and change the thermostat this weekend.
2010-10-26 322.3 mi
518.69 km
13.92 gal (US)
11.59 gal (Imp)
52.69 L
469.1 kWh
$2.66
($37.03 total for this fill)
23.15 mpg (US)
27.81 mpg (Imp)
10.16 L/100 km
4.32 gal (US)/100 mi
1455.48 Wh/mi
Pushing alittle hard due to time constraints.
2010-10-12 312.5 mi
502.92 km
13.32 gal (US)
11.09 gal (Imp)
50.42 L
448.88 kWh
$2.499
($33.29 total for this fill)
23.46 mpg (US)
28.18 mpg (Imp)
10.03 L/100 km
4.26 gal (US)/100 mi
1436.42 Wh/mi
2010-10-06 333.2 mi
536.23 km
13.44 gal (US)
11.19 gal (Imp)
50.88 L
452.93 kWh
$2.559
($34.39 total for this fill)
24.79 mpg (US)
29.78 mpg (Imp)
9.49 L/100 km
4.03 gal (US)/100 mi
1359.33 Wh/mi
Little more highway use on this tank. Approximately 120 miles.
2010-09-30 300.2 mi
483.13 km
13.27 gal (US)
11.05 gal (Imp)
50.23 L
447.2 kWh
$2.449
($32.5 total for this fill)
22.62 mpg (US)
27.17 mpg (Imp)
10.4 L/100 km
4.42 gal (US)/100 mi
1489.67 Wh/mi
2010-09-19 334.5 mi
538.33 km
15.94 gal (US)
13.27 gal (Imp)
60.34 L
537.18 kWh
$2.529
($40.31 total for this fill)
20.98 mpg (US)
25.21 mpg (Imp)
11.21 L/100 km
4.77 gal (US)/100 mi
1605.92 Wh/mi
I let my wife use the car. The mileage reflects her driving style.
2010-09-10 315.1 mi
507.1 km
13.22 gal (US)
11.01 gal (Imp)
50.04 L
445.51 kWh
$2.479
($32.77 total for this fill)
23.84 mpg (US)
28.62 mpg (Imp)
9.87 L/100 km
4.2 gal (US)/100 mi
1413.87 Wh/mi
Been filling up at the same pump to increase accuracy.

Less waiting in the drop off lines. Weather is cooling off.
2010-09-03 252.3 mi
406.04 km
11.46 gal (US)
9.54 gal (Imp)
43.38 L
386.2 kWh
$2.419
($27.72 total for this fill)
22.02 mpg (US)
26.45 mpg (Imp)
10.68 L/100 km
4.54 gal (US)/100 mi
1530.72 Wh/mi
More stopped time waiting in pickup lines. Didn't really try to drive conservatively.
2010-08-29 326.6 mi
525.61 km
13.24 gal (US)
11.02 gal (Imp)
50.12 L
446.19 kWh
$2.439
($32.29 total for this fill)
24.67 mpg (US)
29.64 mpg (Imp)
9.54 L/100 km
4.05 gal (US)/100 mi
1366.17 Wh/mi
Regular driving to work and errands. This time I slacked off on the driving techniques to see if they are really helping. I think the new plugs and wires made a big difference.
2010-08-20 312.8 mi
503.4 km
12.71 gal (US)
10.58 gal (Imp)
48.11 L
428.33 kWh
$2.49
($31.65 total for this fill)
24.61 mpg (US)
29.57 mpg (Imp)
9.56 L/100 km
4.06 gal (US)/100 mi
1369.34 Wh/mi
2010-08-11 365 mi
587.41 km
14.2 gal (US)
11.82 gal (Imp)
53.75 L
478.54 kWh
$2.61
($37.06 total for this fill)
25.7 mpg (US)
30.88 mpg (Imp)
9.15 L/100 km
3.89 gal (US)/100 mi
1311.07 Wh/mi
Okay. This tank is mainly my typical commute with about 70 miles of freeway at 65-70mph. 90% with AC on.

Lots of driving patience. Not sure if this mileage is for real. First tank of really trying.

Mods done. Home depot lawn edging air dam. Taped off lower grille.

New sparkplugs and wires. Believe the wires were bad.

Anyway wife filled the car and the guage says full.


Edited. Found that she didn't fill it all the way. Backed the car down the hill and the guage dropped to near 3/4. My 39mpg went to about 26mpg. Still my best tank. Alot more realistic.
2010-08-06 90.2 mi
145.16 km
3.989 gal (US)
3.32 gal (Imp)
15.1 L
134.43 kWh
$2.59
($10.33 total for this fill)
22.61 mpg (US)
27.17 mpg (Imp)
10.4 L/100 km
4.42 gal (US)/100 mi
1490.35 Wh/mi
All miles pulling a 4x8 trailer. One way loaded the other empty. Speeds under 55mph semi rural/suburban.
2010-08-05 165.4 mi
266.19 km
7.11 gal (US)
5.92 gal (Imp)
26.91 L
239.61 kWh
$2.55
($18.13 total for this fill)
23.26 mpg (US)
27.94 mpg (Imp)
10.11 L/100 km
4.3 gal (US)/100 mi
1448.67 Wh/mi
75% freeway and 25% stop and go. Half of trip with added home depot air dam.

Attempted to coast as much as possible. Disappointed with the results. AC on the whole trip.
2010-08-04 297 mi
477.98 km
13.14 gal (US)
10.94 gal (Imp)
49.74 L
442.82 kWh
$2.56
($33.64 total for this fill)
22.6 mpg (US)
27.15 mpg (Imp)
10.41 L/100 km
4.42 gal (US)/100 mi
1490.98 Wh/mi
Mostly my driving. Approximately 60 miles at freeway speeds or 75-80 mph. Otherwise speeds under 50mph, some waiting in the school drop-off lines.
2010-07-29 320 mi
514.99 km
14.42 gal (US)
12.01 gal (Imp)
54.59 L
485.95 kWh
$2.58
($37.2 total for this fill)
22.19 mpg (US)
26.64 mpg (Imp)
10.6 L/100 km
4.51 gal (US)/100 mi
1518.59 Wh/mi
Typical suburban driving. Traffic and speeds less than 50mph. Also non eco wife driving.

View: spreadsheet friendly fuel log output (for copy/paste)


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