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Fuel log graph
Efficiency log for: Harold - 1994 Honda Civic CX
  • Lifetime Fuel Economy: 52.1 mpg (US), 4.5 L/100 km, 62.5 mpg (Imp)
  • 90-day Fuel Economy: 54.5 mpg (US), 4.3 L/100 km, 65.5 mpg (Imp)
  • 3-tank Fuel Economy: 49.9 mpg (US), 4.7 L/100 km, 59.9 mpg (Imp)
  • EPA Combined Rating / % over rating: 36 mpg (US) / 51.4% (based on 90-day fuel economy)
  • Total fills: 43
  • Average cost per gal/L: $4.19 per gal (US); $0.00 per L (price data entered for 13 fill/s)
  • Average cost per fill: $29.41
  • Average distance cost: $0.08 per mi. / $0.05 per km
  • Total fuel used: 336.79 gal (US), 1274.9 L
  • Total distance traveled: 17534 mi. / 28218.2 km
  • Total cost: $382.28
  • Total fuel saved vs. EPA: 150.3 gal. (US) / 568.9 L
  • Total saved: $629.76 (based on avg. cost per gal./L)
  • Average tank distance: 407.8 mi. / 656.2 km
Fill date Distance Fill amount Price Fuel Economy Details
2008-09-12 471 mi
758 km
8.919 gal (US)
7.43 gal (Imp)
33.76 L
300.57 kWh
$3.499
($31.21 total for this fill)
52.81 mpg (US)
63.39 mpg (Imp)
4.45 L/100 km
1.89 gal (US)/100 mi
638.15 Wh/mi
E10 gasoline.

First tank with boattail.
2008-09-02 451.9 mi
727.26 km
9.547 gal (US)
7.95 gal (Imp)
36.14 L
321.73 kWh
$3.479
($33.21 total for this fill)
47.33 mpg (US)
56.84 mpg (Imp)
4.97 L/100 km
2.11 gal (US)/100 mi
711.95 Wh/mi
E10 gasoline.
2008-08-01 401.3 mi
645.83 km
8.08 gal (US)
6.73 gal (Imp)
30.59 L
272.3 kWh
$3.699
($29.89 total for this fill)
49.67 mpg (US)
59.63 mpg (Imp)
4.74 L/100 km
2.01 gal (US)/100 mi
678.54 Wh/mi
First tank with 87 octane "E10" gasoline.

Gasoline = 90% gas, 10% ethanol.
2008-07-20 416.4 mi
670.13 km
6.861 gal (US)
5.71 gal (Imp)
25.97 L
231.22 kWh
$3.799
($26.06 total for this fill)
60.69 mpg (US)
72.92 mpg (Imp)
3.88 L/100 km
1.65 gal (US)/100 mi
555.28 Wh/mi
Rockport, MO.

Fully loaded, belted alternator.
2008-07-19 499.8 mi
804.35 km
7.824 gal (US)
6.52 gal (Imp)
29.62 L
263.67 kWh
$4.089
($31.99 total for this fill)
63.88 mpg (US)
76.66 mpg (Imp)
3.68 L/100 km
1.57 gal (US)/100 mi
527.55 Wh/mi
Sidney, NE.

Fully loaded, belted alternator, 65-70mph.
2008-07-18 388.9 mi
625.87 km
6.629 gal (US)
5.52 gal (Imp)
25.09 L
223.4 kWh
$4.159
($27.57 total for this fill)
58.67 mpg (US)
70.45 mpg (Imp)
4.01 L/100 km
1.7 gal (US)/100 mi
574.44 Wh/mi
Battle Mount, NV.

Fully loaded, belted alternator.
2008-07-18 345.4 mi
555.87 km
6.179 gal (US)
5.15 gal (Imp)
23.39 L
208.23 kWh
$4.239
($26.19 total for this fill)
55.9 mpg (US)
67.07 mpg (Imp)
4.21 L/100 km
1.79 gal (US)/100 mi
602.87 Wh/mi
Coalville, UT.

Fully loaded, mountains, belted alternator.
2008-07-17 270.6 mi
435.49 km
5.737 gal (US)
4.78 gal (Imp)
21.72 L
193.34 kWh
$4.599
($26.38 total for this fill)
47.17 mpg (US)
56.61 mpg (Imp)
4.99 L/100 km
2.12 gal (US)/100 mi
714.49 Wh/mi
Shingletown, CA.

Fully loaded, mountains, belted alternator.
2008-07-11 125.5 mi
201.97 km
1.883 gal (US)
1.57 gal (Imp)
7.13 L
63.46 kWh
$4.779
($9 total for this fill)
66.65 mpg (US)
79.94 mpg (Imp)
3.53 L/100 km
1.5 gal (US)/100 mi
505.66 Wh/mi
100% unbelted.
Short fill to calibrate MPGuino.
2008-07-10 369 mi
593.85 km
7.148 gal (US)
5.95 gal (Imp)
27.06 L
240.89 kWh
$4.599
($32.87 total for this fill)
51.62 mpg (US)
62.02 mpg (Imp)
4.56 L/100 km
1.94 gal (US)/100 mi
652.82 Wh/mi
50% unbelted.

Roadtrip back from Yosemite. Loaded with 2 people and camping gear.
2008-07-09 285.7 mi
459.79 km
6.978 gal (US)
5.81 gal (Imp)
26.41 L
235.16 kWh
$5.059
($35.3 total for this fill)
40.94 mpg (US)
49.17 mpg (Imp)
5.74 L/100 km
2.44 gal (US)/100 mi
823.1 Wh/mi
100% belted.
EXTREMELY steep grades going into Yosemite on Hwy 120. Again, loaded with 2 people and camping gear.
2008-07-06 477.9 mi
769.11 km
8.415 gal (US)
7.01 gal (Imp)
31.85 L
283.59 kWh
$4.599
($38.7 total for this fill)
56.79 mpg (US)
68.17 mpg (Imp)
4.14 L/100 km
1.76 gal (US)/100 mi
593.41 Wh/mi
100% unbelted.
Roadtrip to Yosemite, car fully loaded with 2 people and camping gear.
2008-06-21 514.4 mi
827.85 km
7.066 gal (US)
5.88 gal (Imp)
26.75 L
238.12 kWh
$4.799
($33.91 total for this fill)
72.8 mpg (US)
87.48 mpg (Imp)
3.23 L/100 km
1.37 gal (US)/100 mi
462.91 Wh/mi
100% unbelted. 1/2 tank of normal commuting, 1/2 tank of 55mph highway trip to Santa Rosa.

Paying much closer attention to driving technique...
2008-06-17 478.2 mi
769.59 km
9.566 gal (US)
7.97 gal (Imp)
36.21 L
322.37 kWh
49.99 mpg (US)
60 mpg (Imp)
4.71 L/100 km
2 gal (US)/100 mi
674.13 Wh/mi
100% unbelted
Hauling four people around mountainous terrain. Not bad for probably exceeding the GVWR...
2008-05-30 435.8 mi
701.35 km
8.052 gal (US)
6.7 gal (Imp)
30.48 L
271.35 kWh
54.12 mpg (US)
65.04 mpg (Imp)
4.35 L/100 km
1.85 gal (US)/100 mi
622.65 Wh/mi
70% unbelted.

Mostly city, lots of short trips on a cold engine.

Water pump leaking...
2008-05-17 443.2 mi
713.26 km
7.24 gal (US)
6.03 gal (Imp)
27.41 L
243.99 kWh
61.22 mpg (US)
73.5 mpg (Imp)
3.84 L/100 km
1.63 gal (US)/100 mi
550.52 Wh/mi
75% unbelted.
Commuting.
2008-05-08 478.2 mi
769.59 km
8.438 gal (US)
7.03 gal (Imp)
31.94 L
284.36 kWh
56.67 mpg (US)
68.02 mpg (Imp)
4.15 L/100 km
1.76 gal (US)/100 mi
594.65 Wh/mi
1/2 tank: 65mph freeway driving up mountian passes.

1/2 tank: Beltless commuting.
2008-05-04 353.7 mi
569.22 km
7.29 gal (US)
6.07 gal (Imp)
27.6 L
245.67 kWh
48.52 mpg (US)
58.27 mpg (Imp)
4.85 L/100 km
2.06 gal (US)/100 mi
694.57 Wh/mi
The wife driving normally on the interstate 70-75mph.
Alternator running with belt.
2008-05-03 91 mi
146.45 km
1.327 gal (US)
1.1 gal (Imp)
5.02 L
44.72 kWh
68.58 mpg (US)
82.73 mpg (Imp)
3.43 L/100 km
1.46 gal (US)/100 mi
491.43 Wh/mi
Lacey MPG Rally course
2008-05-02 411.4 mi
662.08 km
6.004 gal (US)
5 gal (Imp)
22.73 L
202.33 kWh
68.52 mpg (US)
82.28 mpg (Imp)
3.43 L/100 km
1.46 gal (US)/100 mi
491.81 Wh/mi
First full tank with mostly beltless alternator, rear wheel spoilers, completed sideskirts, flush solar kammback.

Holy cow.
2008-04-24 430.2 mi
692.34 km
8.738 gal (US)
7.28 gal (Imp)
33.08 L
294.47 kWh
49.23 mpg (US)
59.09 mpg (Imp)
4.78 L/100 km
2.03 gal (US)/100 mi
684.5 Wh/mi
First tank with alternator kill switch. Alternator turned off about 80% of the time.
Beltless alternator last 50 miles.
2008-04-16 445.4 mi
716.8 km
8.121 gal (US)
6.76 gal (Imp)
30.74 L
273.68 kWh
54.85 mpg (US)
65.89 mpg (Imp)
4.29 L/100 km
1.82 gal (US)/100 mi
614.46 Wh/mi
Got lost going to get my batteries, slow small rutted dirt roads , bad FE.
2008-04-08 499.3 mi
803.55 km
8.718 gal (US)
7.26 gal (Imp)
33 L
293.8 kWh
57.27 mpg (US)
68.77 mpg (Imp)
4.11 L/100 km
1.75 gal (US)/100 mi
588.42 Wh/mi
First tank with partial front and rear bellypan, trimmed airdam, HAI.
2008-03-28 449.6 mi
723.56 km
9.032 gal (US)
7.52 gal (Imp)
34.19 L
304.38 kWh
49.78 mpg (US)
59.79 mpg (Imp)
4.73 L/100 km
2.01 gal (US)/100 mi
677 Wh/mi
WTF?

WAI for last 50 miles.
2008-03-19 446.9 mi
719.22 km
8.245 gal (US)
6.87 gal (Imp)
31.21 L
277.86 kWh
54.2 mpg (US)
65.05 mpg (Imp)
4.34 L/100 km
1.84 gal (US)/100 mi
621.75 Wh/mi
Oil & Filter change. 5w-20 dino juice.
2008-03-09 479.5 mi
771.68 km
8.671 gal (US)
7.22 gal (Imp)
32.82 L
292.21 kWh
55.3 mpg (US)
66.41 mpg (Imp)
4.25 L/100 km
1.81 gal (US)/100 mi
609.41 Wh/mi
Woot. Best tank to date.
2008-03-02 438.9 mi
706.34 km
8.23 gal (US)
6.85 gal (Imp)
31.15 L
277.35 kWh
53.33 mpg (US)
64.07 mpg (Imp)
4.41 L/100 km
1.88 gal (US)/100 mi
631.92 Wh/mi
Driving back from SanFran for half the tank. 65mph instead of my usual 55mph.
2008-02-19 189.6 mi
305.13 km
3.479 gal (US)
2.9 gal (Imp)
13.17 L
117.24 kWh
54.5 mpg (US)
65.38 mpg (Imp)
4.32 L/100 km
1.83 gal (US)/100 mi
618.35 Wh/mi
short tank before the trip to SanFran.
2008-02-16 520.2 mi
837.18 km
9.526 gal (US)
7.93 gal (Imp)
36.06 L
321.03 kWh
54.61 mpg (US)
65.6 mpg (Imp)
4.31 L/100 km
1.83 gal (US)/100 mi
617.13 Wh/mi
Kammback FTW!
2008-02-04 512.3 mi
824.47 km
9.973 gal (US)
8.3 gal (Imp)
37.75 L
336.09 kWh
51.37 mpg (US)
61.72 mpg (Imp)
4.58 L/100 km
1.95 gal (US)/100 mi
656.04 Wh/mi
Disc wheelcovers, no Kammback.

Retroactively applied correction factor of +0.025% to my odometer readings to compensate for the non OEM sized tires.
(175/70r13 vs. 165/70r13)
2008-01-29 494.8 mi
796.3 km
9.155 gal (US)
7.62 gal (Imp)
34.66 L
308.52 kWh
54.05 mpg (US)
64.93 mpg (Imp)
4.35 L/100 km
1.85 gal (US)/100 mi
623.52 Wh/mi
Shoulda' been a crappy tank, with all that coastdown testing at 80mph. I filled up at Chevron instead of Shell (my usual) last time so maybe Chevron doesn't sell E10 yet...
2008-01-20 477.2 mi
767.98 km
9.48 gal (US)
7.89 gal (Imp)
35.89 L
319.48 kWh
50.34 mpg (US)
60.48 mpg (Imp)
4.67 L/100 km
1.99 gal (US)/100 mi
669.49 Wh/mi
First tank w/ mirror delete
2008-01-01 455.8 mi
733.54 km
8.597 gal (US)
7.16 gal (Imp)
32.54 L
289.72 kWh
53.02 mpg (US)
63.66 mpg (Imp)
4.44 L/100 km
1.89 gal (US)/100 mi
635.63 Wh/mi
First tank with airdam? I can't remember, but I think so, also had the mirror delete going for the last 100 miles or so, not enough to make a difference I suppose.
2007-12-16 450.3 mi
724.69 km
9.403 gal (US)
7.83 gal (Imp)
35.59 L
316.88 kWh
47.89 mpg (US)
57.51 mpg (Imp)
4.91 L/100 km
2.09 gal (US)/100 mi
703.71 Wh/mi
clusterfu@# of holiday traffic.
2007-12-06 429.3 mi
690.89 km
9.294 gal (US)
7.74 gal (Imp)
35.18 L
313.21 kWh
46.19 mpg (US)
55.47 mpg (Imp)
5.09 L/100 km
2.16 gal (US)/100 mi
729.58 Wh/mi
Heavy winds (gusting up to 75mph) constant rain and holiday traffic makes for some bad FE.
2007-11-25 457.6 mi
736.44 km
8.312 gal (US)
6.92 gal (Imp)
31.46 L
280.11 kWh
55.05 mpg (US)
66.13 mpg (Imp)
4.27 L/100 km
1.82 gal (US)/100 mi
612.13 Wh/mi
Rear wheel fairings installed.
Think I finally found a technique that my car agrees with:
50-55mph Steady state DWL on the highway.
<45mph P&G w/EOC in town.
2007-11-18 396.3 mi
637.78 km
8.974 gal (US)
7.47 gal (Imp)
33.97 L
302.42 kWh
44.16 mpg (US)
53.05 mpg (Imp)
5.33 L/100 km
2.26 gal (US)/100 mi
763.11 Wh/mi
Higher speed P&G (57mph median speed)
2007-11-09 402.9 mi
648.4 km
8.226 gal (US)
6.85 gal (Imp)
31.14 L
277.22 kWh
48.98 mpg (US)
58.82 mpg (Imp)
4.8 L/100 km
2.04 gal (US)/100 mi
688.06 Wh/mi
New O2 sensor, 195 degree thermostat, P&G on highway (50mph median speed)
2007-10-31 394.6 mi
635.05 km
8.623 gal (US)
7.18 gal (Imp)
32.64 L
290.6 kWh
45.76 mpg (US)
54.96 mpg (Imp)
5.14 L/100 km
2.19 gal (US)/100 mi
736.44 Wh/mi
Temporary grill block, some experimenting with EOC
2007-10-24 370.7 mi
596.58 km
9.006 gal (US)
7.5 gal (Imp)
34.09 L
303.5 kWh
41.16 mpg (US)
49.43 mpg (Imp)
5.71 L/100 km
2.43 gal (US)/100 mi
818.72 Wh/mi
Keeping lowest possible RPM's without engine bucking. ~55mph on highway.
2007-10-15 370.5 mi
596.26 km
8.278 gal (US)
6.89 gal (Imp)
31.34 L
278.97 kWh
44.76 mpg (US)
53.77 mpg (Imp)
5.26 L/100 km
2.23 gal (US)/100 mi
752.96 Wh/mi
New rear tires at 45 psi.
2007-10-10 370 mi
595.46 km
9.067 gal (US)
7.55 gal (Imp)
34.32 L
305.56 kWh
40.81 mpg (US)
49.01 mpg (Imp)
5.76 L/100 km
2.45 gal (US)/100 mi
825.84 Wh/mi
Baseline establishment in progress.
2007-10-02 342.8 mi
551.68 km
8.456 gal (US)
7.04 gal (Imp)
32.01 L
284.97 kWh
40.54 mpg (US)
48.69 mpg (Imp)
5.8 L/100 km
2.47 gal (US)/100 mi
831.3 Wh/mi
First tank since I bought it.
New Headgasket, coolant change, oil change, new brake rotors pads and fluid.

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


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