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Fuel log graph
Efficiency log for: Canfly - 1989 Pontiac Firefly
  • Lifetime Fuel Economy: 57.5 mpg (US), 4.1 L/100 km, 69 mpg (Imp)
  • 90-day Fuel Economy: 57.5 mpg (US), 4.1 L/100 km, 69 mpg (Imp)
  • 3-tank Fuel Economy: 60.8 mpg (US), 3.9 L/100 km, 73.1 mpg (Imp)
  • EPA Combined Rating / % over rating: 43 mpg (US) / 33.7% (based on 90-day fuel economy)
  • Total fills: 9
  • Average cost per gal/L: $3.29 per gal (US); $0.87 per L (price data entered for 9 fill/s)
  • Average cost per fill: $20.29
  • Average distance cost: $0.06 per mi. / $0.04 per km
  • Total fuel used: 55.61 gal (US), 210.5 L
  • Total distance traveled: 3197 mi. / 5145 km
  • Total cost: $182.57
  • Total fuel saved vs. EPA: 18.7 gal. (US) / 70.8 L
  • Total saved: $61.52 (based on avg. cost per gal./L)
  • Average tank distance: 355.2 mi. / 571.7 km
Fill date Distance Fill amount Price Fuel Economy Details
2016-04-21 531 km
329.95 mi
20.735 L
5.48 gal (US)
4.56 gal (Imp)
184.68 kWh
$0.884
($18.33 total for this fill)
3.9 L/100 km
60.21 mpg (US)
72.36 mpg (Imp)
1.66 gal (US)/100 mi
559.72 Wh/mi
the head wind on the last leg of this was horrendous! i'm surprised it wasn't worse.
2016-04-19 519 km
322.49 mi
20.463 L
5.41 gal (US)
4.5 gal (Imp)
182.32 kWh
$0.884
($18.09 total for this fill)
3.94 L/100 km
59.61 mpg (US)
71.66 mpg (Imp)
1.68 gal (US)/100 mi
565.35 Wh/mi
I think I've plateaued with my current mods
2016-04-15 532 km
330.57 mi
19.936 L
5.27 gal (US)
4.39 gal (Imp)
177.6 kWh
$0.884
($17.62 total for this fill)
3.75 L/100 km
62.73 mpg (US)
75.3 mpg (Imp)
1.59 gal (US)/100 mi
537.25 Wh/mi
Didn't think I would match my last fill. But I did no changes just removed some clutter.
2016-04-13 531 km
329.95 mi
19.996 L
5.28 gal (US)
4.4 gal (Imp)
177.94 kWh
$0.959
($19.18 total for this fill)
3.77 L/100 km
62.49 mpg (US)
74.99 mpg (Imp)
1.6 gal (US)/100 mi
539.29 Wh/mi
Gas price jumped 13cent per litre!!!
My air dam is working well
Took my mirrors off for the last run.
2016-04-11 520 km
323.11 mi
21.013 L
5.55 gal (US)
4.62 gal (Imp)
187.04 kWh
$0.824
($17.31 total for this fill)
4.04 L/100 km
58.22 mpg (US)
69.94 mpg (Imp)
1.72 gal (US)/100 mi
578.87 Wh/mi
Put on my first air dam halfway through.
Not as good as I hoped.
2016-04-07 503 km
312.55 mi
20.395 L
5.39 gal (US)
4.49 gal (Imp)
181.64 kWh
$0.824
($16.81 total for this fill)
4.05 L/100 km
57.99 mpg (US)
69.61 mpg (Imp)
1.72 gal (US)/100 mi
581.16 Wh/mi
Drafted on the highway for half of this. Some better P&G on the other half. Getting to know my route and the car better.
2016-04-05 521 km
323.73 mi
21.441 L
5.66 gal (US)
4.72 gal (Imp)
190.74 kWh
$0.844
($18.1 total for this fill)
4.12 L/100 km
57.2 mpg (US)
68.59 mpg (Imp)
1.75 gal (US)/100 mi
589.19 Wh/mi
P&G, EOC, DWL not to excessive though. Removed the passenger seats halfway through.
2016-04-01 624 km
387.74 mi
27.304 L
7.21 gal (US)
6.01 gal (Imp)
242.98 kWh
$0.844
($23.04 total for this fill)
4.38 L/100 km
53.78 mpg (US)
64.52 mpg (Imp)
1.86 gal (US)/100 mi
626.66 Wh/mi
Started out with EOC, P&G, on a slower route. Alternator died There was some idling in the driveway testing and tuning. Installed new sparkplugs Followed by a slightly rushed trip to and from collage.
2016-03-25 864 km
536.86 mi
39.234 L
10.36 gal (US)
8.63 gal (Imp)
349.13 kWh
$0.869
($34.09 total for this fill)
4.54 L/100 km
51.82 mpg (US)
62.21 mpg (Imp)
1.93 gal (US)/100 mi
650.32 Wh/mi
As purchased! but I retarded the timing halfway through because it was knocking.

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


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