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Fuel log graph
Efficiency log for: Ralph - 2007 Mazda MX-5 Miata Sport
  • Lifetime Fuel Economy: 30.4 mpg (US), 7.7 L/100 km, 36.5 mpg (Imp)
  • 90-day Fuel Economy: 32.4 mpg (US), 7.3 L/100 km, 38.9 mpg (Imp)
  • 3-tank Fuel Economy: 30.4 mpg (US), 7.7 L/100 km, 36.5 mpg (Imp)
  • EPA Combined Rating / % over rating: 23 mpg (US) / 40.8% (based on 90-day fuel economy)
  • Total fills: 34
  • Average cost per gal/L: $2.47 per gal (US); $0.00 per L (price data entered for 34 fill/s)
  • Average cost per fill: $22.31
  • Average distance cost: $0.08 per mi. / $0.05 per km
  • Total fuel used: 307.16 gal (US), 1162.7 L
  • Total distance traveled: 9328.7 mi. / 15013.1 km
  • Total cost: $758.53
  • Total fuel saved vs. EPA: 98.4 gal. (US) / 372.5 L
  • Total saved: $243.05 (based on avg. cost per gal./L)
  • Average tank distance: 274.4 mi. / 441.6 km
Fill date Distance Fill amount Price Fuel Economy Details
2017-05-07 276.2 mi
444.5 km
8.531 gal (US)
7.1 gal (Imp)
32.29 L
287.49 kWh
$2.559
($21.83 total for this fill)
32.38 mpg (US)
38.9 mpg (Imp)
7.26 L/100 km
3.09 gal (US)/100 mi
1040.88 Wh/mi
2016-10-26 284.9 mi
458.5 km
9.474 gal (US)
7.89 gal (Imp)
35.86 L
319.27 kWh
$2.389
($22.63 total for this fill)
30.07 mpg (US)
36.11 mpg (Imp)
7.82 L/100 km
3.33 gal (US)/100 mi
1120.64 Wh/mi
89 pump octane
2016-09-03 263.2 mi
423.58 km
9.106 gal (US)
7.58 gal (Imp)
34.47 L
306.87 kWh
$2.479
($22.57 total for this fill)
28.9 mpg (US)
34.72 mpg (Imp)
8.14 L/100 km
3.46 gal (US)/100 mi
1165.92 Wh/mi
This tank is calculated on premium fuel (93 Octane) but I filled up with mid-grade (89 Octane). I wish to see not only how it runs on mid-grade but how that may affect my gas mileage and fuel economy.
2016-06-23 288.9 mi
464.94 km
9.979 gal (US)
8.31 gal (Imp)
37.77 L
336.29 kWh
$2.719
($27.13 total for this fill)
28.95 mpg (US)
34.77 mpg (Imp)
8.12 L/100 km
3.45 gal (US)/100 mi
1164.04 Wh/mi
2016-06-10 227.1 mi
365.48 km
7.24 gal (US)
6.03 gal (Imp)
27.41 L
243.99 kWh
$2.899
($20.99 total for this fill)
31.37 mpg (US)
37.66 mpg (Imp)
7.5 L/100 km
3.19 gal (US)/100 mi
1074.37 Wh/mi
2016-06-08 272.2 mi
438.06 km
8.784 gal (US)
7.31 gal (Imp)
33.25 L
296.02 kWh
$2.879
($25.29 total for this fill)
30.99 mpg (US)
37.24 mpg (Imp)
7.59 L/100 km
3.23 gal (US)/100 mi
1087.51 Wh/mi
2016-05-16 101.4 mi
163.19 km
3.473 gal (US)
2.89 gal (Imp)
13.15 L
117.04 kWh
$2.599
($9.03 total for this fill)
29.2 mpg (US)
35.09 mpg (Imp)
8.06 L/100 km
3.43 gal (US)/100 mi
1154.24 Wh/mi
80 miles hauling the Bunkhouse camper at highway speeds. The remaining 20 miles trailerless. Small sample may not be representative.
2016-05-16 255.3 mi
410.87 km
9.387 gal (US)
7.82 gal (Imp)
35.53 L
316.34 kWh
$2.639
($24.77 total for this fill)
27.2 mpg (US)
32.65 mpg (Imp)
8.65 L/100 km
3.68 gal (US)/100 mi
1239.09 Wh/mi
Hauled Bunkhouse camper trailer for part of the tank. Beachside cruising at 30 to 45 mph stop and go.
2016-05-13 305.1 mi
491.01 km
9.506 gal (US)
7.91 gal (Imp)
35.98 L
320.35 kWh
$2.649
($25.18 total for this fill)
32.1 mpg (US)
38.57 mpg (Imp)
7.33 L/100 km
3.12 gal (US)/100 mi
1049.98 Wh/mi
2016-05-04 278.6 mi
448.36 km
9.115 gal (US)
7.59 gal (Imp)
34.5 L
307.18 kWh
$2.659
($24.24 total for this fill)
30.57 mpg (US)
36.71 mpg (Imp)
7.69 L/100 km
3.27 gal (US)/100 mi
1102.58 Wh/mi
2016-04-17 298 mi
479.58 km
9.263 gal (US)
7.71 gal (Imp)
35.06 L
312.16 kWh
$2.479
($22.96 total for this fill)
32.17 mpg (US)
38.65 mpg (Imp)
7.31 L/100 km
3.11 gal (US)/100 mi
1047.52 Wh/mi
2016-04-10 282.6 mi
454.8 km
9.102 gal (US)
7.58 gal (Imp)
34.45 L
306.74 kWh
$2.329
($21.2 total for this fill)
31.05 mpg (US)
37.28 mpg (Imp)
7.57 L/100 km
3.22 gal (US)/100 mi
1085.42 Wh/mi
2016-03-25 273.8 mi
440.64 km
9.048 gal (US)
7.53 gal (Imp)
34.25 L
304.92 kWh
$2.379
($21.53 total for this fill)
30.26 mpg (US)
36.36 mpg (Imp)
7.77 L/100 km
3.3 gal (US)/100 mi
1113.66 Wh/mi
2016-03-12 278.2 mi
447.72 km
9.284 gal (US)
7.73 gal (Imp)
35.14 L
312.87 kWh
$2.299
($21.34 total for this fill)
29.97 mpg (US)
35.99 mpg (Imp)
7.85 L/100 km
3.34 gal (US)/100 mi
1124.62 Wh/mi
2016-02-21 254.7 mi
409.9 km
8.603 gal (US)
7.16 gal (Imp)
32.57 L
289.92 kWh
$2.059
($17.71 total for this fill)
29.61 mpg (US)
35.57 mpg (Imp)
7.95 L/100 km
3.38 gal (US)/100 mi
1138.28 Wh/mi
2016-02-11 278.7 mi
448.52 km
9.805 gal (US)
8.17 gal (Imp)
37.12 L
330.43 kWh
$2.599
($25.48 total for this fill)
28.42 mpg (US)
34.11 mpg (Imp)
8.28 L/100 km
3.52 gal (US)/100 mi
1185.61 Wh/mi
2016-02-03 272.2 mi
438.06 km
9.524 gal (US)
7.93 gal (Imp)
36.05 L
320.96 kWh
$2.099
($19.99 total for this fill)
28.58 mpg (US)
34.33 mpg (Imp)
8.23 L/100 km
3.5 gal (US)/100 mi
1179.13 Wh/mi
2016-01-18 267.7 mi
430.82 km
9.241 gal (US)
7.69 gal (Imp)
34.98 L
311.42 kWh
$2.269
($20.97 total for this fill)
28.97 mpg (US)
34.81 mpg (Imp)
8.12 L/100 km
3.45 gal (US)/100 mi
1163.32 Wh/mi
Back to the normal around town driving but with top up because it's been cold.
2016-01-02 349.5 mi
562.47 km
9.788 gal (US)
8.15 gal (Imp)
37.05 L
329.86 kWh
$2.399
($23.48 total for this fill)
35.71 mpg (US)
42.88 mpg (Imp)
6.59 L/100 km
2.8 gal (US)/100 mi
943.81 Wh/mi
Interstate and highway, top up.
2016-01-02 302.4 mi
486.67 km
9.344 gal (US)
7.78 gal (Imp)
35.37 L
314.89 kWh
$2.119
($19.8 total for this fill)
32.36 mpg (US)
38.87 mpg (Imp)
7.27 L/100 km
3.09 gal (US)/100 mi
1041.3 Wh/mi
Interstate, top up crossing the Blue Ridge Mountains.
2015-12-29 338.7 mi
545.08 km
9.834 gal (US)
8.19 gal (Imp)
37.23 L
331.41 kWh
$2.139
($21.03 total for this fill)
34.44 mpg (US)
41.36 mpg (Imp)
6.83 L/100 km
2.9 gal (US)/100 mi
978.48 Wh/mi
Some interstate top up, mostly mountain roads top down.
2015-12-28 295.6 mi
475.72 km
8.244 gal (US)
6.87 gal (Imp)
31.21 L
277.82 kWh
$2.279
($18.79 total for this fill)
35.86 mpg (US)
43.03 mpg (Imp)
6.56 L/100 km
2.79 gal (US)/100 mi
939.85 Wh/mi
All interstate driving, 60 to 72 mph, top up.
2015-12-28 316.2 mi
508.87 km
9.664 gal (US)
8.05 gal (Imp)
36.58 L
325.68 kWh
$2.749
($26.57 total for this fill)
32.72 mpg (US)
39.28 mpg (Imp)
7.19 L/100 km
3.06 gal (US)/100 mi
1029.98 Wh/mi
All highway miles, first 100 miles top down the rest top up.
2015-12-26 255.9 mi
411.83 km
9.292 gal (US)
7.74 gal (Imp)
35.17 L
313.14 kWh
$2.489
($23.13 total for this fill)
27.54 mpg (US)
33.06 mpg (Imp)
8.54 L/100 km
3.63 gal (US)/100 mi
1223.68 Wh/mi
Slow pump overfilled and fuel spilled onto the ground. This was a complete top off and not the normal top off. The next tank may be great.
2015-12-21 253.1 mi
407.32 km
8.328 gal (US)
6.93 gal (Imp)
31.52 L
280.65 kWh
$2.509
($20.89 total for this fill)
30.39 mpg (US)
36.52 mpg (Imp)
7.74 L/100 km
3.29 gal (US)/100 mi
1108.85 Wh/mi
2015-12-14 278 mi
447.4 km
9.525 gal (US)
7.93 gal (Imp)
36.06 L
320.99 kWh
$2.149
($20.47 total for this fill)
29.19 mpg (US)
35.06 mpg (Imp)
8.06 L/100 km
3.43 gal (US)/100 mi
1154.64 Wh/mi
2015-11-21 283.9 mi
456.89 km
9.569 gal (US)
7.97 gal (Imp)
36.22 L
322.48 kWh
$2.449
($23.43 total for this fill)
29.67 mpg (US)
35.62 mpg (Imp)
7.93 L/100 km
3.37 gal (US)/100 mi
1135.89 Wh/mi
2015-11-05 286.6 mi
461.24 km
10.001 gal (US)
8.33 gal (Imp)
37.86 L
337.03 kWh
$2.619
($26.19 total for this fill)
28.66 mpg (US)
34.41 mpg (Imp)
8.21 L/100 km
3.49 gal (US)/100 mi
1175.96 Wh/mi
2015-10-19 284.6 mi
458.02 km
9.113 gal (US)
7.59 gal (Imp)
34.5 L
307.11 kWh
$2.469
($22.5 total for this fill)
31.23 mpg (US)
37.5 mpg (Imp)
7.53 L/100 km
3.2 gal (US)/100 mi
1079.09 Wh/mi
2015-10-17 257.5 mi
414.41 km
9.08 gal (US)
7.56 gal (Imp)
34.37 L
306 kWh
$2.679
($24.33 total for this fill)
28.36 mpg (US)
34.06 mpg (Imp)
8.29 L/100 km
3.53 gal (US)/100 mi
1188.35 Wh/mi
2015-10-11 270.3 mi
435.01 km
9.271 gal (US)
7.72 gal (Imp)
35.09 L
312.43 kWh
$2.569
($23.82 total for this fill)
29.16 mpg (US)
35.01 mpg (Imp)
8.07 L/100 km
3.43 gal (US)/100 mi
1155.86 Wh/mi
2015-10-04 265.2 mi
426.8 km
9.561 gal (US)
7.96 gal (Imp)
36.19 L
322.21 kWh
$2.519
($24.08 total for this fill)
27.74 mpg (US)
33.32 mpg (Imp)
8.48 L/100 km
3.61 gal (US)/100 mi
1214.97 Wh/mi
2015-09-25 259.7 mi
417.95 km
8.882 gal (US)
7.4 gal (Imp)
33.62 L
299.32 kWh
$2.499
($22.2 total for this fill)
29.24 mpg (US)
35.09 mpg (Imp)
8.04 L/100 km
3.42 gal (US)/100 mi
1152.56 Wh/mi
2015-09-19 272.7 mi
438.87 km
9.195 gal (US)
7.66 gal (Imp)
34.81 L
309.87 kWh
$2.499
($22.98 total for this fill)
29.66 mpg (US)
35.6 mpg (Imp)
7.93 L/100 km
3.37 gal (US)/100 mi
1136.3 Wh/mi
Ralph likes premium fuel.

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


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