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Fuel log graph
Efficiency log for: Silver Bullet - 1986 Chevy Camaro Z28
  • Lifetime Fuel Economy: 19.7 mpg (US), 12 L/100 km, 23.6 mpg (Imp)
  • 90-day Fuel Economy: 19.7 mpg (US), 11.9 L/100 km, 23.7 mpg (Imp)
  • 3-tank Fuel Economy: 20.1 mpg (US), 11.7 L/100 km, 24.2 mpg (Imp)
  • EPA Combined Rating / % over rating: 18 mpg (US) / 9.7% (based on 90-day fuel economy)
  • Total fills: 13
  • Average cost per gal/L: $3.85 per gal (US); $0.00 per L (price data entered for 13 fill/s)
  • Average cost per fill: $48.82
  • Average distance cost: $0.20 per mi. / $0.12 per km
  • Total fuel used: 164.73 gal (US), 623.6 L
  • Total distance traveled: 3237.8 mi. / 5210.7 km
  • Total cost: $634.63
  • Total fuel saved vs. EPA: 15.1 gal. (US) / 57.2 L
  • Total saved: $58.14 (based on avg. cost per gal./L)
  • Average tank distance: 249.1 mi. / 400.8 km
Fill date Distance Fill amount Price Fuel Economy Details
2011-11-16 248.78 mi
400.37 km
12.451 gal (US)
10.37 gal (Imp)
47.13 L
419.6 kWh
$3.699
($46.06 total for this fill)
19.98 mpg (US)
23.99 mpg (Imp)
11.77 L/100 km
5 gal (US)/100 mi
1686.63 Wh/mi
No changes, car has been sitting near E for a couple weeks now, finally had to drive it again.
2011-10-10 281.2 mi
452.55 km
13.023 gal (US)
10.84 gal (Imp)
49.3 L
438.88 kWh
$3.659
($47.65 total for this fill)
21.59 mpg (US)
25.94 mpg (Imp)
10.89 L/100 km
4.63 gal (US)/100 mi
1560.74 Wh/mi
Nothing really new this tank.
2011-09-16 256.1 mi
412.15 km
13.554 gal (US)
11.29 gal (Imp)
51.31 L
456.77 kWh
$3.859
($52.3 total for this fill)
18.89 mpg (US)
22.68 mpg (Imp)
12.45 L/100 km
5.29 gal (US)/100 mi
1783.56 Wh/mi
nothing new
2011-08-30 260.1 mi
418.59 km
13.963 gal (US)
11.63 gal (Imp)
52.86 L
470.55 kWh
$3.879
($54.16 total for this fill)
18.63 mpg (US)
22.36 mpg (Imp)
12.63 L/100 km
5.37 gal (US)/100 mi
1809.11 Wh/mi
Commuting the 5 mins to work everyday, couple 30 minute trips to visit family. Adjusted the TPS to correct .5V at idle vs .25V previous towards end of tank. Early on in the tank I added a TV cable spring to raise shift rpms and firm up shifts. Car tends to rev up more now, its a little too tight now
2011-08-18 248.6 mi
400.08 km
12.52 gal (US)
10.42 gal (Imp)
47.39 L
421.92 kWh
$3.829
($47.94 total for this fill)
19.86 mpg (US)
23.86 mpg (Imp)
11.85 L/100 km
5.04 gal (US)/100 mi
1697.18 Wh/mi
Nothing new
2011-08-08 250 mi
402.34 km
12.96 gal (US)
10.79 gal (Imp)
49.06 L
436.75 kWh
$3.799
($49.24 total for this fill)
19.29 mpg (US)
23.17 mpg (Imp)
12.19 L/100 km
5.18 gal (US)/100 mi
1747 Wh/mi
Standard 8 minute drive to work, and then a few trips up to my garage to work on stuff after hours. Car has spent almost no time in garage for repairs. Drove it hard a few times.
2011-07-31 267.8 mi
430.98 km
12.3 gal (US)
10.24 gal (Imp)
46.56 L
414.51 kWh
$3.899
($47.96 total for this fill)
21.77 mpg (US)
26.15 mpg (Imp)
10.8 L/100 km
4.59 gal (US)/100 mi
1547.83 Wh/mi
First full tank with functional coolant fan. Combination of 160* thermostat and 176* fan switch makes fan run a lot. For some reason its running even when it doesn't need to. Also been real hot this tank.
2011-07-24 256.1 mi
412.15 km
12.65 gal (US)
10.53 gal (Imp)
47.89 L
426.31 kWh
$3.859
($48.82 total for this fill)
20.25 mpg (US)
24.32 mpg (Imp)
11.62 L/100 km
4.94 gal (US)/100 mi
1664.62 Wh/mi
Couple longer trips this tank. Finally installed the 176-on coolant fan switch and a new 160 thermostat, so car stays under 176 most of the time vs running 250+ prior to replacing switch (fan wouldn't come on)
2011-07-16 197.8 mi
318.33 km
10.75 gal (US)
8.95 gal (Imp)
40.69 L
362.28 kWh
$3.859
($41.48 total for this fill)
18.4 mpg (US)
22.1 mpg (Imp)
12.78 L/100 km
5.43 gal (US)/100 mi
1831.55 Wh/mi
Spent some time idling fixing temp gauge, etc. Couple longer trips as well.
2011-06-16 232.9 mi
374.82 km
12.51 gal (US)
10.42 gal (Imp)
47.36 L
421.59 kWh
$3.879
($48.53 total for this fill)
18.62 mpg (US)
22.35 mpg (Imp)
12.64 L/100 km
5.37 gal (US)/100 mi
1810.18 Wh/mi
Nothing new this tank mpg-wise, lowered the front of car 1.5" and got an alignment last day of tank so next tank maybe slightly better. Noticed the second water-temp sensor I removed changed the idle rpm, perhaps ecm in open loop again.
2011-05-30 250.8 mi
403.62 km
12.83 gal (US)
10.68 gal (Imp)
48.57 L
432.37 kWh
$3.899
($50.02 total for this fill)
19.55 mpg (US)
23.48 mpg (Imp)
12.03 L/100 km
5.12 gal (US)/100 mi
1723.96 Wh/mi
Replaced the O2 sensor which fixed the rich-mixture issue. Also reset idle. Several hard-throttle runs due to enjoying the smoother-running motor
2011-05-25 244.9 mi
394.13 km
11.97 gal (US)
9.97 gal (Imp)
45.31 L
403.39 kWh
$3.989
($47.75 total for this fill)
20.46 mpg (US)
24.56 mpg (Imp)
11.5 L/100 km
4.89 gal (US)/100 mi
1647.16 Wh/mi
One extra longer trip this tank, but did some idling/local driving adjusting kickdown cable. Replaced the water temp sensor prior owners had cut out, leaving computer in warm-up mode all the time. Car is still running rich, trying to find why.
2011-05-21 242.7 mi
390.59 km
13.25 gal (US)
11.03 gal (Imp)
50.16 L
446.53 kWh
$3.979
($52.72 total for this fill)
18.32 mpg (US)
22 mpg (Imp)
12.84 L/100 km
5.46 gal (US)/100 mi
1839.84 Wh/mi
Car's running rich, can smell it. A few full-throttle takeoffs/passing moves don't help. Windows down/ T-tops out several trips probably really hurt the aero as well.

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