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Fuel log graph
Efficiency log for: Mom's Firefly - 1992 Pontiac Firefly
  • Lifetime Fuel Economy: 34.7 mpg (US), 6.8 L/100 km, 41.6 mpg (Imp)
  • 90-day Fuel Economy: 35.7 mpg (US), 6.6 L/100 km, 42.8 mpg (Imp)
  • 3-tank Fuel Economy: 35.4 mpg (US), 6.7 L/100 km, 42.5 mpg (Imp)
  • EPA Combined Rating / % over rating: 33 mpg (US) / 8% (based on 90-day fuel economy)
  • Total fills: 11
  • Average cost per gal/L: $4.81 per gal (US); $1.27 per L (price data entered for 11 fill/s)
  • Average cost per fill: $19.94
  • Average distance cost: $0.12 per mi. / $0.08 per km
  • Total fuel used: 51.34 gal (US), 194.3 L
  • Total distance traveled: 1779.4 mi. / 2863.7 km
  • Total cost: $219.33
  • Total fuel saved vs. EPA: 2.6 gal. (US) / 9.8 L
  • Total saved: $12.51 (based on avg. cost per gal./L)
  • Average tank distance: 161.8 mi. / 260.3 km
Fill date Distance Fill amount Price Fuel Economy Details
2012-06-03 220 km
136.7 mi
14.667 L
3.87 gal (US)
3.23 gal (Imp)
130.42 kWh
$1.319
($19.35 total for this fill)
6.67 L/100 km
35.32 mpg (US)
42.32 mpg (Imp)
2.83 gal (US)/100 mi
954.06 Wh/mi
2012-06-02 186.1 km
115.64 mi
12.843 L
3.39 gal (US)
2.83 gal (Imp)
114.24 kWh
$1.309
($16.81 total for this fill)
6.9 L/100 km
34.11 mpg (US)
40.86 mpg (Imp)
2.93 gal (US)/100 mi
987.89 Wh/mi
2012-05-29 191.1 km
118.74 mi
12.214 L
3.23 gal (US)
2.69 gal (Imp)
108.85 kWh
$1.239
($15.13 total for this fill)
6.39 L/100 km
36.76 mpg (US)
44.14 mpg (Imp)
2.72 gal (US)/100 mi
916.71 Wh/mi
Me driving.
2012-05-29 223.6 km
138.94 mi
14.443 L
3.82 gal (US)
3.18 gal (Imp)
128.73 kWh
$1.239
($17.89 total for this fill)
6.46 L/100 km
36.37 mpg (US)
43.69 mpg (Imp)
2.75 gal (US)/100 mi
926.52 Wh/mi
Me driving pizza delivery.
2012-05-26 65 km
40.39 mi
4.2594 L
1.13 gal (US)
0.94 gal (Imp)
38.08 kWh
$1.239
($5.28 total for this fill)
6.55 L/100 km
35.74 mpg (US)
42.97 mpg (Imp)
2.8 gal (US)/100 mi
942.81 Wh/mi
Mom driving.
2010-12-26 218.8 mi
352.12 km
6.72 gal (US)
5.6 gal (Imp)
25.44 L
226.46 kWh
$4.274
($28.72 total for this fill)
32.56 mpg (US)
39.07 mpg (Imp)
7.22 L/100 km
3.07 gal (US)/100 mi
1035.01 Wh/mi
2009-12-07 211.3 mi
340.05 km
6.344 gal (US)
5.28 gal (Imp)
24.01 L
213.79 kWh
$3.971
($25.19 total for this fill)
33.31 mpg (US)
40.02 mpg (Imp)
7.06 L/100 km
3 gal (US)/100 mi
1011.78 Wh/mi
I get the feeling that fill-ups haven't been 100% accurate lately.
2009-12-03 93.52 mi
150.51 km
3.236 gal (US)
2.69 gal (Imp)
12.25 L
109.05 kWh
$3.971
($12.85 total for this fill)
28.9 mpg (US)
34.77 mpg (Imp)
8.14 L/100 km
3.46 gal (US)/100 mi
1166.06 Wh/mi
I think the last fill-up didn't go all the way to the top or something. Either that or winter is really killing the mileage on this thing.
2009-07-01 233.3 mi
375.46 km
6.686 gal (US)
5.57 gal (Imp)
25.31 L
225.32 kWh
$4.092
($27.36 total for this fill)
34.89 mpg (US)
41.89 mpg (Imp)
6.74 L/100 km
2.87 gal (US)/100 mi
965.8 Wh/mi
It's my mom.
2009-06-22 242.7 mi
390.59 km
6.548 gal (US)
5.45 gal (Imp)
24.79 L
220.67 kWh
$3.782
($24.76 total for this fill)
37.06 mpg (US)
44.53 mpg (Imp)
6.35 L/100 km
2.7 gal (US)/100 mi
909.23 Wh/mi
2009-05-24 229.4 mi
369.18 km
6.365 gal (US)
5.3 gal (Imp)
24.09 L
214.5 kWh
$4.084
($25.99 total for this fill)
36.04 mpg (US)
43.28 mpg (Imp)
6.53 L/100 km
2.77 gal (US)/100 mi
935.05 Wh/mi
My mom drove most of this tank, I put on about 50 miles.

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


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