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Fuel log graph
Efficiency log for: Emerald - 1997 Honda Civic CXi
  • Lifetime Fuel Economy: 37.9 mpg (US), 6.2 L/100 km, 45.5 mpg (Imp)
  • 90-day Fuel Economy: 40.1 mpg (US), 5.9 L/100 km, 48.2 mpg (Imp)
  • 3-tank Fuel Economy: 39.8 mpg (US), 5.9 L/100 km, 47.7 mpg (Imp)
  • EPA Combined Rating / % over rating: 30 mpg (US) / 33.8% (based on 90-day fuel economy)
  • Total fills: 27
  • Average cost per gal/L: $39.52 per gal (US); $10.44 per L (price data entered for 27 fill/s)
  • Average cost per fill: $291.39
  • Average distance cost: $1.04 per mi. / $0.65 per km
  • Total fuel used: 199.06 gal (US), 753.5 L
  • Total distance traveled: 7536.9 mi. / 12129.4 km
  • Total cost: $7,867.64
  • Total fuel saved vs. EPA: 52.2 gal. (US) / 197.6 L
  • Total saved: $2062.94 (based on avg. cost per gal./L)
  • Average tank distance: 279.1 mi. / 449.2 km
Fill date Distance Fill amount Price Fuel Economy Details
2015-02-18 533.7 km
331.63 mi
30.66 L
8.1 gal (US)
6.74 gal (Imp)
272.97 kWh
$119.9
($3676.13 total for this fill)
5.74 L/100 km
40.94 mpg (US)
49.2 mpg (Imp)
2.44 gal (US)/100 mi
823.12 Wh/mi
Approx 70% country 30% city

Last fill: ULP 91
This fill: ULP 91
2015-02-09 458.2 km
284.71 mi
28.21 L
7.45 gal (US)
6.21 gal (Imp)
251.07 kWh
$116.9
($3297.75 total for this fill)
6.16 L/100 km
38.22 mpg (US)
45.85 mpg (Imp)
2.62 gal (US)/100 mi
881.84 Wh/mi
Approx 60% country 40% city. "Full speed" commutes.

Last fill: ULP 91
This fill: ULP 91
2015-01-30 466.5 km
289.87 mi
27.39 L
7.24 gal (US)
6.02 gal (Imp)
243.99 kWh
$0.999
($27.36 total for this fill)
5.87 L/100 km
40.04 mpg (US)
48.15 mpg (Imp)
2.5 gal (US)/100 mi
841.72 Wh/mi
Approx 70% country 30% city. Quite a bit of AC usage.

Last fill: ULP 91
This fill: ULP 91
2015-01-22 497.9 km
309.38 mi
28.03 L
7.4 gal (US)
6.17 gal (Imp)
249.38 kWh
$0.999
($28 total for this fill)
5.63 L/100 km
41.81 mpg (US)
50.14 mpg (Imp)
2.39 gal (US)/100 mi
806.06 Wh/mi
Approx 70% country 30% city

Last fill: ULP 91
This fill: ULP 91
2015-01-15 470.2 km
292.17 mi
26.94 L
7.12 gal (US)
5.93 gal (Imp)
239.94 kWh
$1.089
($29.34 total for this fill)
5.73 L/100 km
41.04 mpg (US)
49.27 mpg (Imp)
2.44 gal (US)/100 mi
821.23 Wh/mi
Approx 80% country 20% city - back to the regular commute.

Last fill: ULP 91
This fill: ULP 91
2015-01-07 535.9 km
332.99 mi
30.58 L
8.08 gal (US)
6.73 gal (Imp)
272.3 kWh
$1.085
($33.18 total for this fill)
5.71 L/100 km
41.21 mpg (US)
49.48 mpg (Imp)
2.43 gal (US)/100 mi
817.74 Wh/mi
Approx 80% country 20% city - unusually large amount of gentle country driving, some warm weather (35-45 C)

Last fill: ULP 91
This fill: ULP 91
2014-12-26 284.1 km
176.53 mi
17.37 L
4.59 gal (US)
3.82 gal (Imp)
154.68 kWh
$1.099
($19.09 total for this fill)
6.11 L/100 km
38.46 mpg (US)
46.21 mpg (Imp)
2.6 gal (US)/100 mi
876.23 Wh/mi
Approx 80% country 20% city.

New spark plugs - yay! (champion rc10yc4 copper to NGK ZFR5FIX-11 iridium, very noticably smoother at low RPMs w. mid to with throttle). ECU reset and idle learn procedure - ugh.

Last fill: ULP 91
This fill: ULP 91
2014-12-23 281.3 km
174.79 mi
17.84 L
4.71 gal (US)
3.92 gal (Imp)
158.73 kWh
$1.099
($19.61 total for this fill)
6.34 L/100 km
37.11 mpg (US)
44.59 mpg (Imp)
2.69 gal (US)/100 mi
908.12 Wh/mi
Approx 50% country 50% city... Short trips - ugh. Christmas shopping - ugh.

Last fill: ULP 91
This fill: ULP 91
2014-12-19 471 km
292.67 mi
27.4 L
7.24 gal (US)
6.03 gal (Imp)
243.99 kWh
$1.133
($31.04 total for this fill)
5.82 L/100 km
40.42 mpg (US)
48.54 mpg (Imp)
2.47 gal (US)/100 mi
833.67 Wh/mi
Approx 70% country 30% city

Mixed loads, experimenting with accelerating to take advantage of BSFC.

Last fill: ULP 91
This fill: ULP 91
2014-12-12 339.6 km
211.02 mi
20.07 L
5.3 gal (US)
4.41 gal (Imp)
178.61 kWh
$1.202
($24.12 total for this fill)
5.91 L/100 km
39.82 mpg (US)
47.85 mpg (Imp)
2.51 gal (US)/100 mi
846.41 Wh/mi
Approx 80% country 20% city

Last fill: ULP 91
This fill: ULP 91
2014-12-07 485.4 km
301.61 mi
28.26 L
7.47 gal (US)
6.22 gal (Imp)
251.74 kWh
$1.285
($36.31 total for this fill)
5.82 L/100 km
40.38 mpg (US)
48.49 mpg (Imp)
2.48 gal (US)/100 mi
834.65 Wh/mi
Approx 80% country 20% city

Car was serviced - may have been topped up a litre or two?

Last fill: ULP 91
This fill: ULP 91
2014-11-27 430.5 km
267.5 mi
26.55 L
7.01 gal (US)
5.84 gal (Imp)
236.24 kWh
$1.399
($37.14 total for this fill)
6.17 L/100 km
38.16 mpg (US)
45.8 mpg (Imp)
2.62 gal (US)/100 mi
883.14 Wh/mi
Approx 80% country 20% city - had to do a few full-speed commutes.

Last fill: ULP 91
This fill: ULP 91
2014-11-20 470.6 km
292.42 mi
28.64 L
7.57 gal (US)
6.3 gal (Imp)
255.11 kWh
$1.497
($42.87 total for this fill)
6.09 L/100 km
38.63 mpg (US)
46.42 mpg (Imp)
2.59 gal (US)/100 mi
872.41 Wh/mi
Approx 60% country 40% city

Last fill: ULP 91
This fill: ULP 91
2014-11-11 444 km
275.89 mi
26.24 L
6.93 gal (US)
5.77 gal (Imp)
233.54 kWh
$1.289
($33.82 total for this fill)
5.91 L/100 km
39.81 mpg (US)
47.81 mpg (Imp)
2.51 gal (US)/100 mi
846.5 Wh/mi
Approx 80% country 20% city
Driving technique change - top speed on freeway sections of commute reduced by approx. 10-20 kph, as convenient (from 110kph to 90-100kph).

Last fill: ULP 91
This fill: ULP 91
2014-11-04 413 km
256.63 mi
26.57 L
7.02 gal (US)
5.84 gal (Imp)
236.57 kWh
$1.289
($34.25 total for this fill)
6.43 L/100 km
36.56 mpg (US)
43.94 mpg (Imp)
2.74 gal (US)/100 mi
921.83 Wh/mi
Approx 60% country 40% city

Last fill: ULP 91
This fill: ULP 91
2014-10-29 481.1 km
298.94 mi
29.75 L
7.86 gal (US)
6.54 gal (Imp)
264.88 kWh
$1.299
($38.65 total for this fill)
6.18 L/100 km
38.03 mpg (US)
45.71 mpg (Imp)
2.63 gal (US)/100 mi
886.06 Wh/mi
Approx 80% country 20% city

Last fill: ULP 91
This fill: ULP 91
2014-10-20 406.5 km
252.59 mi
25.53 L
6.74 gal (US)
5.62 gal (Imp)
227.14 kWh
$1.345
($34.34 total for this fill)
6.28 L/100 km
37.48 mpg (US)
44.94 mpg (Imp)
2.67 gal (US)/100 mi
899.24 Wh/mi
Approx 80% country 20% city

Last fill: ULP 91
This fill: ULP 91
2014-10-15 452.5 km
281.17 mi
27.67 L
7.31 gal (US)
6.09 gal (Imp)
246.35 kWh
$1.399
($38.71 total for this fill)
6.11 L/100 km
38.46 mpg (US)
46.17 mpg (Imp)
2.6 gal (US)/100 mi
876.16 Wh/mi
Approx 80% country 20% city

Last fill: ULP 91
This fill: ULP 91
2014-10-11 451 km
280.24 mi
31.4 L
8.3 gal (US)
6.91 gal (Imp)
279.71 kWh
$1.469
($46.13 total for this fill)
6.96 L/100 km
33.76 mpg (US)
40.56 mpg (Imp)
2.96 gal (US)/100 mi
998.11 Wh/mi
Approx 70% country 30% city, still shifting

Last fill: premium 95
This fill: ULP 91
2014-10-09 467 km
290.18 mi
31.32 L
8.27 gal (US)
6.89 gal (Imp)
278.7 kWh
$1.609
($50.39 total for this fill)
6.71 L/100 km
35.09 mpg (US)
42.12 mpg (Imp)
2.85 gal (US)/100 mi
960.44 Wh/mi
Approx. 80% country 20% city, still shifting house
Last fill: ULP 91
This fill: Premium 95
2014-09-29 362.6 km
225.31 mi
22.12 L
5.84 gal (US)
4.87 gal (Imp)
196.81 kWh
$1.344
($29.73 total for this fill)
6.1 L/100 km
38.58 mpg (US)
46.26 mpg (Imp)
2.59 gal (US)/100 mi
873.51 Wh/mi
Approx. 80% country 20% city, still shifting.

Unsure why this tank was so good - could be due to many country kms on the flat instead of the usual hills, or could be pump error...

Last fill: ULP 91
This fill: ULP 91
2014-09-26 455.5 km
283.03 mi
31.24 L
8.25 gal (US)
6.87 gal (Imp)
278.03 kWh
$1.339
($41.83 total for this fill)
6.86 L/100 km
34.31 mpg (US)
41.2 mpg (Imp)
2.91 gal (US)/100 mi
982.33 Wh/mi
Approx 80% country 20% city, shifting

Last fill: ULP 91
This fill: ULP 91
2014-09-20 496.6 km
308.57 mi
33.29 L
8.79 gal (US)
7.32 gal (Imp)
296.22 kWh
$1.369
($45.57 total for this fill)
6.7 L/100 km
35.1 mpg (US)
42.15 mpg (Imp)
2.85 gal (US)/100 mi
959.98 Wh/mi
Approx. 80% country 20% city - small amount of shifting

Last fill: ULP 91
This fill: ULP 91

Changed tyres & wheels at 330km, from: 175/65r14 w. 2.5mm of tread to 195/50r15 w. 5.5mm tread. Tyre radius change is approx. 291.55 - 8 + 2.5 = 286.05mm to 288 - 8 + 5.5 = 285.5mm, so should be same odometer readings to within measurement error (which I'd put at about +/- 1mm, cumulative). Within 0.5%, anyhow. Note: no actual odo calibration done yet.
2014-09-14 476.6 km
296.15 mi
33.51 L
8.85 gal (US)
7.37 gal (Imp)
298.25 kWh
$1.448
($48.52 total for this fill)
7.03 L/100 km
33.46 mpg (US)
40.18 mpg (Imp)
2.99 gal (US)/100 mi
1007.09 Wh/mi
Approx. 50/50 city & country
Still shifting

This fill: ULP 91
Last fill: ULP 91
2014-09-05 541.8 km
336.66 mi
35.37 L
9.34 gal (US)
7.78 gal (Imp)
314.76 kWh
$1.449
($51.25 total for this fill)
6.53 L/100 km
36.04 mpg (US)
43.27 mpg (Imp)
2.77 gal (US)/100 mi
934.95 Wh/mi
Approx. 70% country 30% city, still shifting house
Last fill: ULP 91
This fill: ULP 91
2014-08-29 489.8 km
304.35 mi
34.23 L
9.04 gal (US)
7.53 gal (Imp)
304.65 kWh
$1.319
($45.15 total for this fill)
6.99 L/100 km
33.67 mpg (US)
40.42 mpg (Imp)
2.97 gal (US)/100 mi
1000.99 Wh/mi
First tank!

Roughly 30% city 70% country, and shifting house (up hill)

Last fill: Premium unleaded (98 octane)
This fill: ULP 91
0000-00-00 466.5 km
289.87 mi
27.39 L
7.24 gal (US)
6.02 gal (Imp)
243.99 kWh
$0.999
($27.36 total for this fill)
5.87 L/100 km
40.04 mpg (US)
48.15 mpg (Imp)
2.5 gal (US)/100 mi
841.72 Wh/mi
Approx 70% country 30% city. Fair bit of AC usage.

Last fill: ULP 91
This fill: ULP 91

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


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