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Fuel log graph
Efficiency log for: RX - 1986 Mazda RX7 Base
  • Lifetime Fuel Economy: 18.2 mpg (US), 12.9 L/100 km, 21.9 mpg (Imp)
  • 90-day Fuel Economy: 14.4 mpg (US), 16.3 L/100 km, 17.3 mpg (Imp)
  • 3-tank Fuel Economy: 18.4 mpg (US), 12.8 L/100 km, 22 mpg (Imp)
  • EPA Combined Rating / % over rating: 18 mpg (US) / -19.9% (based on 90-day fuel economy)
  • Total fills: 17
  • Average cost per gal/L: $2.29 per gal (US); $0.00 per L (price data entered for 14 fill/s)
  • Average cost per fill: $19.66
  • Average distance cost: $0.13 per mi. / $0.08 per km
  • Total fuel used: 147.01 gal (US), 556.5 L
  • Total distance traveled: 2680.1 mi. / 4313.2 km
  • Total cost: $275.22
  • Total fuel saved vs. EPA: 1.9 gal. (US) / 7.2 L
  • Total saved: $4.35 (based on avg. cost per gal./L)
  • Average tank distance: 157.7 mi. / 253.7 km
Fill date Distance Fill amount Price Fuel Economy Details
2017-06-21 154 mi
247.84 km
10.686 gal (US)
8.9 gal (Imp)
40.45 L
360.12 kWh
$2.649
($28.31 total for this fill)
14.41 mpg (US)
17.3 mpg (Imp)
16.32 L/100 km
6.94 gal (US)/100 mi
2338.44 Wh/mi
City in town driving
2016-07-11 237.3 mi
381.9 km
13.184 gal (US)
10.98 gal (Imp)
49.91 L
444.3 kWh
$2.439
($32.16 total for this fill)
18 mpg (US)
21.61 mpg (Imp)
13.07 L/100 km
5.56 gal (US)/100 mi
1872.31 Wh/mi
All in town. Turned mostly into a weekend vehicle so harder driving with a few higher RPM launches. Definitely stretching the gears more.
2016-05-07 163.7 mi
263.45 km
6.358 gal (US)
5.29 gal (Imp)
24.07 L
214.26 kWh
$2.299
($14.62 total for this fill)
25.75 mpg (US)
30.95 mpg (Imp)
9.14 L/100 km
3.88 gal (US)/100 mi
1308.86 Wh/mi
Highway driving back from Montana - hot weather with window open - during the day
2016-05-07 98 mi
157.72 km
3.045 gal (US)
2.54 gal (Imp)
11.53 L
102.62 kWh
$2.24
($6.82 total for this fill)
32.18 mpg (US)
38.58 mpg (Imp)
7.31 L/100 km
3.11 gal (US)/100 mi
1047.14 Wh/mi
Highway driving during the day - hot weather with window open
2016-05-07 185.3 mi
298.21 km
10.412 gal (US)
8.67 gal (Imp)
39.41 L
350.88 kWh
$2.319
($24.15 total for this fill)
17.8 mpg (US)
21.37 mpg (Imp)
13.22 L/100 km
5.62 gal (US)/100 mi
1893.58 Wh/mi
City driving to work
2016-04-21 217.3 mi
349.71 km
12.645 gal (US)
10.53 gal (Imp)
47.87 L
426.14 kWh
$2.089
($26.42 total for this fill)
17.18 mpg (US)
20.64 mpg (Imp)
13.69 L/100 km
5.82 gal (US)/100 mi
1961.07 Wh/mi
100% city driving - commute of ~7 miles up and down hills
2016-03-30 120.9 mi
194.57 km
4.393 gal (US)
3.66 gal (Imp)
16.63 L
148.04 kWh
$2.149
($9.44 total for this fill)
27.52 mpg (US)
33.03 mpg (Imp)
8.55 L/100 km
3.63 gal (US)/100 mi
1224.48 Wh/mi
Tail end of the trip
55-65 mph
headlights up
brake ducts still taped
Some city driving to get to work the next day
2016-03-30 203 mi
326.7 km
7.753 gal (US)
6.46 gal (Imp)
29.35 L
261.28 kWh
$2.359
($18.29 total for this fill)
26.18 mpg (US)
31.42 mpg (Imp)
8.98 L/100 km
3.82 gal (US)/100 mi
1287.09 Wh/mi
Same conditions
Driving over mountain pass
55-65 mph
headlights up
2016-03-27 141.1 mi
227.08 km
5.638 gal (US)
4.69 gal (Imp)
21.34 L
190 kWh
$2.699
($15.22 total for this fill)
25.03 mpg (US)
30.09 mpg (Imp)
9.4 L/100 km
4 gal (US)/100 mi
1346.56 Wh/mi
Some city driving but 95% highway driving
Taped up front
Lights up
Windows down occasionally
2016-03-25 173 mi
278.42 km
6.336 gal (US)
5.27 gal (Imp)
23.98 L
213.52 kWh
27.3 mpg (US)
32.83 mpg (Imp)
8.61 L/100 km
3.66 gal (US)/100 mi
1234.22 Wh/mi
100% highway driving
Stayed around 55-65mph
Taped up front brake ducts and small seams
Headlights up
2016-03-24 151.6 mi
243.98 km
10.802 gal (US)
8.99 gal (Imp)
40.89 L
364.03 kWh
$1.899
($20.51 total for this fill)
14.03 mpg (US)
16.86 mpg (Imp)
16.76 L/100 km
7.13 gal (US)/100 mi
2401.25 Wh/mi
City driving and another few coolant flushes
2016-03-07 116.3 mi
187.17 km
8.548 gal (US)
7.12 gal (Imp)
32.36 L
288.07 kWh
$1.899
($16.23 total for this fill)
13.61 mpg (US)
16.33 mpg (Imp)
17.29 L/100 km
7.35 gal (US)/100 mi
2476.96 Wh/mi
All city driving + lots of idling due to coolant flush
2015-10-21 109 mi
175.42 km
7.564 gal (US)
6.3 gal (Imp)
28.63 L
254.91 kWh
$1.769
($13.38 total for this fill)
14.41 mpg (US)
17.3 mpg (Imp)
16.32 L/100 km
6.94 gal (US)/100 mi
2338.62 Wh/mi
City again
2015-09-29 191 mi
307.38 km
11.663 gal (US)
9.71 gal (Imp)
44.15 L
393.04 kWh
$2.469
($28.8 total for this fill)
16.38 mpg (US)
19.67 mpg (Imp)
14.36 L/100 km
6.11 gal (US)/100 mi
2057.8 Wh/mi
100% city driving - Smooth driving with a few 8000 rpm pulls
2015-09-12 109 mi
175.42 km
7.3 gal (US)
6.08 gal (Imp)
27.63 L
246.01 kWh
$2.859
($20.87 total for this fill)
14.93 mpg (US)
17.93 mpg (Imp)
15.75 L/100 km
6.7 gal (US)/100 mi
2256.97 Wh/mi
2015-09-12 166.6 mi
268.12 km
10.78 gal (US)
8.98 gal (Imp)
40.81 L
363.29 kWh
15.45 mpg (US)
18.55 mpg (Imp)
15.22 L/100 km
6.47 gal (US)/100 mi
2180.61 Wh/mi
City driving
2015-09-12 143 mi
230.14 km
9.9 gal (US)
8.24 gal (Imp)
37.48 L
333.63 kWh
14.44 mpg (US)
17.35 mpg (Imp)
16.29 L/100 km
6.92 gal (US)/100 mi
2333.08 Wh/mi
All city driving

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


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