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Fuel log graph
Efficiency log for: 1993 Civic EX 1.6L - 1993 Honda Civic EX
  • Lifetime Fuel Economy: 47.6 mpg (US), 4.9 L/100 km, 57.2 mpg (Imp)
  • 90-day Fuel Economy: 49.6 mpg (US), 4.7 L/100 km, 59.6 mpg (Imp)
  • 3-tank Fuel Economy: 48 mpg (US), 4.9 L/100 km, 57.6 mpg (Imp)
  • EPA Combined Rating / % over rating: 28.5 mpg (US) / 74.1% (based on 90-day fuel economy)
  • Total fills: 40
  • Average cost per gal/L: $3.65 per gal (US); $0.00 per L (price data entered for 40 fill/s)
  • Average cost per fill: $28.00
  • Average distance cost: $0.08 per mi. / $0.05 per km
  • Total fuel used: 307.27 gal (US), 1163.2 L
  • Total distance traveled: 14632.3 mi. / 23548.4 km
  • Total cost: $1,120.16
  • Total fuel saved vs. EPA: 206.1 gal. (US) / 780.2 L
  • Total saved: $752.27 (based on avg. cost per gal./L)
  • Average tank distance: 365.8 mi. / 588.7 km
Fill date Distance Fill amount Price Fuel Economy Details
2011-11-30 391.6 mi
630.22 km
8.694 gal (US)
7.24 gal (Imp)
32.91 L
292.99 kWh
$3.43
($29.82 total for this fill)
45.04 mpg (US)
54.09 mpg (Imp)
5.22 L/100 km
2.22 gal (US)/100 mi
748.19 Wh/mi
:-( 45mpg????

Haven't been this low since I first got the car. Going to install a PCV catch can soon.
2011-11-23 481.6 mi
775.06 km
9.327 gal (US)
7.77 gal (Imp)
35.31 L
314.32 kWh
$3.46
($32.27 total for this fill)
51.64 mpg (US)
61.98 mpg (Imp)
4.56 L/100 km
1.94 gal (US)/100 mi
652.66 Wh/mi
After I filled up for this run, I pulled the fuse on the backup memory. I believe this reset the adaptive memory of the computer. Results speak for themselves.
2011-11-16 481.6 mi
775.06 km
10.204 gal (US)
8.5 gal (Imp)
38.63 L
343.87 kWh
$3.5
($35.71 total for this fill)
47.2 mpg (US)
56.66 mpg (Imp)
4.98 L/100 km
2.12 gal (US)/100 mi
714.02 Wh/mi
Going down? I'm not sure why. I also removed the power steering belt.
2011-11-10 481.6 mi
775.06 km
9.996 gal (US)
8.32 gal (Imp)
37.84 L
336.87 kWh
$3.56
($35.59 total for this fill)
48.18 mpg (US)
57.88 mpg (Imp)
4.88 L/100 km
2.08 gal (US)/100 mi
699.48 Wh/mi
2011-11-04 481.6 mi
775.06 km
9.828 gal (US)
8.18 gal (Imp)
37.2 L
331.2 kWh
$3.56
($34.99 total for this fill)
49 mpg (US)
58.88 mpg (Imp)
4.8 L/100 km
2.04 gal (US)/100 mi
687.71 Wh/mi
2011-10-31 483 mi
777.31 km
10.153 gal (US)
8.45 gal (Imp)
38.43 L
342.16 kWh
$3.56
($36.14 total for this fill)
47.57 mpg (US)
57.16 mpg (Imp)
4.94 L/100 km
2.1 gal (US)/100 mi
708.41 Wh/mi
2011-10-25 486.6 mi
783.11 km
9.007 gal (US)
7.5 gal (Imp)
34.1 L
303.54 kWh
$3.56
($32.06 total for this fill)
54.02 mpg (US)
64.88 mpg (Imp)
4.35 L/100 km
1.85 gal (US)/100 mi
623.8 Wh/mi
I removed the passenger wheel skirt and side skirt because they weren't really helping a whole lot. I see there is an improvement in FE prob because I'm playing with a MAP sensor potentiometer. We shall see if this stays consistent.
2011-10-19 481.6 mi
775.06 km
9.486 gal (US)
7.9 gal (Imp)
35.91 L
319.68 kWh
$3.58
($33.96 total for this fill)
50.77 mpg (US)
60.96 mpg (Imp)
4.63 L/100 km
1.97 gal (US)/100 mi
663.79 Wh/mi
Car starts up just fine now that the optimizer was removed. It must have been making it too lean upon startup.
2011-10-13 479.6 mi
771.84 km
9.489 gal (US)
7.9 gal (Imp)
35.92 L
319.78 kWh
$3.58
($33.97 total for this fill)
50.54 mpg (US)
60.71 mpg (Imp)
4.65 L/100 km
1.98 gal (US)/100 mi
666.76 Wh/mi
Removed the O2ptimizer...installed passenger side rear wheel skirt.
2011-10-06 488.8 mi
786.65 km
9.606 gal (US)
8 gal (Imp)
36.36 L
323.72 kWh
$3.6
($34.58 total for this fill)
50.88 mpg (US)
61.1 mpg (Imp)
4.62 L/100 km
1.97 gal (US)/100 mi
662.27 Wh/mi
2011-09-30 376.2 mi
605.44 km
7.393 gal (US)
6.16 gal (Imp)
27.99 L
249.14 kWh
$3.6
($26.61 total for this fill)
50.89 mpg (US)
61.07 mpg (Imp)
4.62 L/100 km
1.97 gal (US)/100 mi
662.25 Wh/mi
Car is hard starting....so that is why I replaced the spark plugs to Pulstar Iridium, and added MSD ignition with external coil. Plug wires are the same. Oh, replaced the fuel filter too.

I also removed the Aquatune....it was pulling too much water and the engine didn't like that.

My next mods will be aerodynamic in nature. Anyone know where I can get some 7" or 9" deep lawn edging??
2011-09-27 361.2 mi
581.3 km
7.002 gal (US)
5.83 gal (Imp)
26.51 L
235.97 kWh
$3.6
($25.21 total for this fill)
51.59 mpg (US)
61.96 mpg (Imp)
4.56 L/100 km
1.94 gal (US)/100 mi
653.29 Wh/mi
Traveling around 50-55 on the hwy.
2011-09-22 456.6 mi
734.83 km
8.932 gal (US)
7.44 gal (Imp)
33.81 L
301.01 kWh
$3.6
($32.16 total for this fill)
51.12 mpg (US)
61.37 mpg (Imp)
4.6 L/100 km
1.96 gal (US)/100 mi
659.24 Wh/mi
Still trying to drive at low rpms on the highway. Around 50-60mph. I am at 7 cents per mile on this run. Soon I'll be installing MSD rotor and cap, with Pulstar plugs.

I also did partial grill block.
2011-09-15 120.8 mi
194.41 km
2.049 gal (US)
1.71 gal (Imp)
7.76 L
69.05 kWh
$3.76
($7.7 total for this fill)
58.96 mpg (US)
70.64 mpg (Imp)
3.99 L/100 km
1.7 gal (US)/100 mi
571.61 Wh/mi
I tried my hand at some hypermiling-controling my speeds and shifting rpms....so I cruised our I-80 going between 50-55mph. The only engine mod I have is a water injection device called the Aquatune.

I did install a new front air dam. So perhaps that helped a bit with aero drag. Nice numbers! Although, this is only for 120 miles...so next time I'll go a full 480mi so see if this is consistent.
2011-09-14 486.6 mi
783.11 km
10.635 gal (US)
8.86 gal (Imp)
40.26 L
358.4 kWh
$3.76
($39.99 total for this fill)
45.75 mpg (US)
54.92 mpg (Imp)
5.14 L/100 km
2.19 gal (US)/100 mi
736.54 Wh/mi
Installed Front air dam.
2011-08-29 483.1 mi
777.47 km
10.44 gal (US)
8.69 gal (Imp)
39.52 L
351.83 kWh
$3.66
($38.21 total for this fill)
46.27 mpg (US)
55.59 mpg (Imp)
5.08 L/100 km
2.16 gal (US)/100 mi
728.28 Wh/mi
Still without water injection. I'll probably install it soon.
2011-08-23 481.6 mi
775.06 km
10.43 gal (US)
8.68 gal (Imp)
39.48 L
351.49 kWh
$3.64
($37.97 total for this fill)
46.17 mpg (US)
55.48 mpg (Imp)
5.09 L/100 km
2.17 gal (US)/100 mi
729.84 Wh/mi
Removed the HAFC and the Water injection, and the HCS in order to install an A/C system. I am also experimenting with E10 fuel. What matters is my price per mile, not necessarily my mpg. We shall see.
2011-08-16 371.2 mi
597.39 km
7.99 gal (US)
6.65 gal (Imp)
30.25 L
269.26 kWh
$3.7
($29.56 total for this fill)
46.46 mpg (US)
55.82 mpg (Imp)
5.06 L/100 km
2.15 gal (US)/100 mi
725.38 Wh/mi
2011-08-11 371.2 mi
597.39 km
7.97 gal (US)
6.64 gal (Imp)
30.17 L
268.59 kWh
$3.7
($29.49 total for this fill)
46.57 mpg (US)
55.9 mpg (Imp)
5.05 L/100 km
2.15 gal (US)/100 mi
723.57 Wh/mi
My throttle body must be gummed up because sometimes my gas pedal sticks. This introduced a lot of high idling which burns up extra fuel. Grrr. I will try to take it apart this weekend and clean it good. A new one costs $250! Gag.
2011-08-08 371.2 mi
597.39 km
7.5 gal (US)
6.24 gal (Imp)
28.39 L
252.75 kWh
$3.7
($27.75 total for this fill)
49.49 mpg (US)
59.49 mpg (Imp)
4.75 L/100 km
2.02 gal (US)/100 mi
680.9 Wh/mi
I think my water injection is kicking in.....and giving me a slight boost?
2011-08-03 386.2 mi
621.53 km
8.65 gal (US)
7.2 gal (Imp)
32.74 L
291.51 kWh
$3.7
($32.01 total for this fill)
44.65 mpg (US)
53.64 mpg (Imp)
5.27 L/100 km
2.24 gal (US)/100 mi
754.82 Wh/mi
Contained some city driving....about 25 miles worth.
2011-07-27 375 mi
603.5 km
7.94 gal (US)
6.61 gal (Imp)
30.06 L
267.58 kWh
$3.7
($29.38 total for this fill)
47.23 mpg (US)
56.73 mpg (Imp)
4.98 L/100 km
2.12 gal (US)/100 mi
713.55 Wh/mi
Also installed Aquatune....a water injection device, and turned the HCS into an H2O cracking system. Holding steady at around 46mpg.......I'm glad it is not dropping in mileage, but perplexed at why it isn't fluctuating from a result of all the stuff I add or change.
2011-07-22 492.8 mi
793.08 km
10.61 gal (US)
8.83 gal (Imp)
40.16 L
357.56 kWh
$3.7
($39.26 total for this fill)
46.45 mpg (US)
55.81 mpg (Imp)
5.06 L/100 km
2.15 gal (US)/100 mi
725.57 Wh/mi
2011-07-15 130.4 mi
209.86 km
2.8 gal (US)
2.33 gal (Imp)
10.6 L
94.36 kWh
$3.7
($10.36 total for this fill)
46.57 mpg (US)
55.97 mpg (Imp)
5.05 L/100 km
2.15 gal (US)/100 mi
723.62 Wh/mi
2011-07-14 550 mi
885.14 km
11.75 gal (US)
9.78 gal (Imp)
44.48 L
395.98 kWh
$3.7
($43.48 total for this fill)
46.81 mpg (US)
56.24 mpg (Imp)
5.03 L/100 km
2.14 gal (US)/100 mi
719.96 Wh/mi
2011-07-08 492.8 mi
793.08 km
10.61 gal (US)
8.83 gal (Imp)
40.16 L
357.56 kWh
$3.57
($37.88 total for this fill)
46.45 mpg (US)
55.81 mpg (Imp)
5.06 L/100 km
2.15 gal (US)/100 mi
725.57 Wh/mi
By accident, I had the optimizer turned off during my driving when I thought it was turned on. Next fillup should reflect some sensor mods. Also I'll have HHO going for at least 120 miles....
2011-07-01 255.8 mi
411.67 km
5.49 gal (US)
4.57 gal (Imp)
20.78 L
185.01 kWh
$3.57
($19.6 total for this fill)
46.59 mpg (US)
55.97 mpg (Imp)
5.05 L/100 km
2.15 gal (US)/100 mi
723.26 Wh/mi
Not as high as I would have hoped. I thought the MAP adjuster would have helped, but this confirms what I've been reading, and that is that you also need an EFIE. Also, I heard that your O2 sensor is the king when it comes to the A/F ratio and cruising mileage. But your MAP sensor is king when you pop into open loop for city driving. I need to stop procrastinating and get this Optimizer installed!!
2011-06-28 255.4 mi
411.03 km
5.33 gal (US)
4.44 gal (Imp)
20.18 L
179.62 kWh
$3.57
($19.03 total for this fill)
47.92 mpg (US)
57.52 mpg (Imp)
4.91 L/100 km
2.09 gal (US)/100 mi
703.29 Wh/mi
I have installed a MAP sensor enhancer. I used it for about 120 miles in this run. I will soon have the Optimizer installed where I can adjust the O2 sensor as well.
2011-06-25 390 mi
627.64 km
7.95 gal (US)
6.62 gal (Imp)
30.09 L
267.92 kWh
$3.57
($28.38 total for this fill)
49.06 mpg (US)
58.91 mpg (Imp)
4.79 L/100 km
2.04 gal (US)/100 mi
686.97 Wh/mi
Drove to Bishop CA and back today. Not bad for having no sensor adjustments! Soon I'll have an o2 sensor and map sensor adjusters on....
2011-06-25 130.4 mi
209.86 km
2.98 gal (US)
2.48 gal (Imp)
11.28 L
100.43 kWh
$3.74
($11.15 total for this fill)
43.76 mpg (US)
52.58 mpg (Imp)
5.38 L/100 km
2.29 gal (US)/100 mi
770.17 Wh/mi
One day of travel. I needed to top off before my 390 mile trip from Fallon to Bishop today.
2011-06-23 250.8 mi
403.62 km
5.24 gal (US)
4.36 gal (Imp)
19.84 L
176.59 kWh
$3.74
($19.6 total for this fill)
47.86 mpg (US)
57.52 mpg (Imp)
4.92 L/100 km
2.09 gal (US)/100 mi
704.11 Wh/mi
Still using a fuel heater, ozone tap from distributor, but the o2 sensors are not enhanced yet. They need to be as I am still dumping 14.7:1 A/F ratio when it could stand to be leaned out. Not a bad mileage number though...
2011-06-21 425 mi
683.97 km
9.24 gal (US)
7.69 gal (Imp)
34.98 L
311.39 kWh
$3.74
($34.56 total for this fill)
46 mpg (US)
55.27 mpg (Imp)
5.11 L/100 km
2.17 gal (US)/100 mi
732.68 Wh/mi
I have a fuel heater installed, and a hydrogen generator installed, but the generator is not hooked up yet. I have an optimizer but it also is not installed yet.
2011-06-16 250 mi
402.34 km
5.12 gal (US)
4.26 gal (Imp)
19.38 L
172.54 kWh
$3.84
($19.66 total for this fill)
48.83 mpg (US)
58.69 mpg (Imp)
4.82 L/100 km
2.05 gal (US)/100 mi
690.16 Wh/mi
The is the first legitimate run using the HCS. I will go another run to see what we come to. In a few days I will be installing a Hydrogen generator.
2011-06-14 260 mi
418.43 km
5.77 gal (US)
4.8 gal (Imp)
21.84 L
194.45 kWh
$3.84
($22.16 total for this fill)
45.06 mpg (US)
54.17 mpg (Imp)
5.22 L/100 km
2.22 gal (US)/100 mi
747.88 Wh/mi
I completed my side mirrors delete, grounded the exhaust, and installed the HCS (Hydrocarbon Cracking System). I'll give it another 2 fillups to see if it made a difference. BTW, in case anyone is wondering about my low mileage fillups, I'm only filling up about half a tank. This way, I can check my mileage more often...which is about every two days....since I drive 120 miles a day.
2011-06-10 125 mi
201.17 km
2.71 gal (US)
2.26 gal (Imp)
10.26 L
91.33 kWh
$3.84
($10.41 total for this fill)
46.13 mpg (US)
55.31 mpg (Imp)
5.1 L/100 km
2.17 gal (US)/100 mi
730.64 Wh/mi
This is more like it! Perhaps the better fuel plus the ozone mod is helping some. My driving habits have remained steady. Soon, I'll be playing around with some aero mods like a grill block and side mirror delete. HHO is coming soon.....
2011-06-09 244.6 mi
393.65 km
5.82 gal (US)
4.85 gal (Imp)
22.03 L
196.13 kWh
$3.84
($22.35 total for this fill)
42.03 mpg (US)
50.43 mpg (Imp)
5.6 L/100 km
2.38 gal (US)/100 mi
801.84 Wh/mi
This is a transition fill up. I am moving to a different gas station...the only one in our town that does NOT add 10% ethanol. The price is a little higher and it is 5 miles outside of town.
2011-06-07 258.6 mi
416.18 km
6.292 gal (US)
5.24 gal (Imp)
23.82 L
212.04 kWh
$3.76
($23.66 total for this fill)
41.1 mpg (US)
49.35 mpg (Imp)
5.72 L/100 km
2.43 gal (US)/100 mi
819.95 Wh/mi
Performed an O2 sensor wrap with aluminum foil and extracted ozone from the distributor cap. MPG is down...prob from a little bit of city driving.
2011-06-03 241.2 mi
388.17 km
5.28 gal (US)
4.4 gal (Imp)
19.99 L
177.94 kWh
$3.76
($19.85 total for this fill)
45.68 mpg (US)
54.82 mpg (Imp)
5.15 L/100 km
2.19 gal (US)/100 mi
737.73 Wh/mi
This reflects windshield wiper delete, and folded mirrors. All highway miles.
2011-06-01 261 mi
420.04 km
6.06 gal (US)
5.05 gal (Imp)
22.94 L
204.22 kWh
$3.76
($22.79 total for this fill)
43.07 mpg (US)
51.68 mpg (Imp)
5.46 L/100 km
2.32 gal (US)/100 mi
782.45 Wh/mi
240mi hwy, the rest city.
2011-05-25 240 mi
386.24 km
5.5 gal (US)
4.58 gal (Imp)
20.82 L
185.35 kWh
$3.79
($20.85 total for this fill)
43.64 mpg (US)
52.4 mpg (Imp)
5.39 L/100 km
2.29 gal (US)/100 mi
772.29 Wh/mi
First fill up since acquiring the car.

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


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