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Fuel log graph
Efficiency log for: Black Mamba - 1997 Honda Civic HX
  • Lifetime Fuel Economy: 40.1 mpg (US), 5.9 L/100 km, 48.2 mpg (Imp)
  • 90-day Fuel Economy: 40.1 mpg (US), 5.9 L/100 km, 48.2 mpg (Imp)
  • 3-tank Fuel Economy: 41.6 mpg (US), 5.7 L/100 km, 49.9 mpg (Imp)
  • EPA Combined Rating / % over rating: 34 mpg (US) / 18% (based on 90-day fuel economy)
  • Total fills: 5
  • Average cost per gal/L: $3.96 per gal (US); $0.00 per L (price data entered for 5 fill/s)
  • Average cost per fill: $31.24
  • Average distance cost: $0.10 per mi. / $0.06 per km
  • Total fuel used: 39.45 gal (US), 149.3 L
  • Total distance traveled: 1583 mi. / 2547.6 km
  • Total cost: $156.21
  • Total fuel saved vs. EPA: 7.1 gal. (US) / 26.9 L
  • Total saved: $28.12 (based on avg. cost per gal./L)
  • Average tank distance: 316.6 mi. / 509.5 km
Fill date Distance Fill amount Price Fuel Economy Details
2014-08-26 320 mi
514.99 km
7.54 gal (US)
6.28 gal (Imp)
28.54 L
254.1 kWh
$3.83
($28.88 total for this fill)
42.44 mpg (US)
50.96 mpg (Imp)
5.54 L/100 km
2.36 gal (US)/100 mi
794.06 Wh/mi
No idea how I got this good of mpg, I did a lot of idling at work for warmth. I probably got more, but when I installed my LED's in my dash I accidentally reset the trip. I know the last time I saw it, it was at 140 so I just used that value plus what I drove after that.
2014-08-16 351 mi
564.88 km
9.161 gal (US)
7.63 gal (Imp)
34.68 L
308.73 kWh
$3.89
($35.64 total for this fill)
38.31 mpg (US)
46 mpg (Imp)
6.14 L/100 km
2.61 gal (US)/100 mi
879.57 Wh/mi
When I filled up I could not believe my eyes on how much mileage I got on this tank. I filled up at the same pump I always do and it was only 9F hotter then my base fill temp (75F is equal ground). I did this the following tank.

Seafoam in vacuum line, took for an extremely brutal drive afterwards.
Compression test.
All city driving except 160 miles.
HX to VX tranny swap. Beat it up real bad to test out new tranny.
Drove on a cold start twice to my close by job, zooming and vrooming to get there on time (2.5-3.2k RPM shifts).
4 cold starts on those 2 shifts to drive about 200 yards and then idle for like 5 mins before engine cut off.
More random idling getting fast food and such.
Extreme A/C use.
No more lean burn (no idea why).
Cleaned EGR chamber, took for brutal slam and jam test drive afterwards. Lots of idling on this too.
2014-07-26 311.7 mi
501.63 km
6.939 gal (US)
5.78 gal (Imp)
26.27 L
233.84 kWh
$3.99
($27.69 total for this fill)
44.92 mpg (US)
53.93 mpg (Imp)
5.24 L/100 km
2.23 gal (US)/100 mi
750.21 Wh/mi
I probably would have got 46+ but, my CEL is on and I'm having to apply a lot more throttle at take off in order for it to not give me the "herky jerky". Next tank I am hoping to see 46+. UG showed 49.1.
2014-07-22 250 mi
402.34 km
6.446 gal (US)
5.37 gal (Imp)
24.4 L
217.23 kWh
$3.99
($25.72 total for this fill)
38.78 mpg (US)
46.55 mpg (Imp)
6.06 L/100 km
2.58 gal (US)/100 mi
868.92 Wh/mi
I honestly don't understand why I got such low mpg, but I guess it is what it is. I think there is a problem somewhere and I also believe that the damaged front end has something to do with it.
2014-07-16 350.3 mi
563.75 km
9.36 gal (US)
7.79 gal (Imp)
35.43 L
315.43 kWh
$4.09
($38.28 total for this fill)
37.43 mpg (US)
44.97 mpg (Imp)
6.28 L/100 km
2.67 gal (US)/100 mi
900.46 Wh/mi
Did a lot of idling this tank + got a smog done. Front tires are out of alignment but until I replace the axle I'm not going to waste the money.

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


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