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Fuel log graph
Efficiency log for: Black and Green - 1998 Honda Civic DX Coupe
  • Lifetime Fuel Economy: 61.8 mpg (US), 3.8 L/100 km, 74.3 mpg (Imp)
  • 90-day Fuel Economy: 66.2 mpg (US), 3.6 L/100 km, 79.5 mpg (Imp)
  • 3-tank Fuel Economy: 65.2 mpg (US), 3.6 L/100 km, 78.3 mpg (Imp)
  • EPA Combined Rating / % over rating: 30 mpg (US) / 120.6% (based on 90-day fuel economy)
  • Total fills: 80
  • Average cost per gal/L: $3.98 per gal (US); $0.00 per L (price data entered for 80 fill/s)
  • Average cost per fill: $37.57
  • Average distance cost: $0.06 per mi. / $0.04 per km
  • Total fuel used: 755.74 gal (US), 2860.8 L
  • Total distance traveled: 46723.8 mi. / 75194.6 km
  • Total cost: $3,005.41
  • Total fuel saved vs. EPA: 801.7 gal. (US) / 3034.8 L
  • Total saved: $3190.77 (based on avg. cost per gal./L)
  • Average tank distance: 584 mi. / 939.9 km
Fill date Distance Fill amount Price Fuel Economy Details
2014-09-27 658.817 mi
1060.26 km
10.683 gal (US)
8.9 gal (Imp)
40.44 L
360.02 kWh
$3.559
($38.02 total for this fill)
61.67 mpg (US)
74.02 mpg (Imp)
3.81 L/100 km
1.62 gal (US)/100 mi
546.46 Wh/mi
Lower average is the result of losing my wheel skirts, airdam, and injector kill switch repairs/failures in the last 300 or more miles of the tank. I was over 67mpg until this started happening.

5.31kwh on the killawatt.
640.25 on the stock odometer before calibration multiplier.
Got to use my usual pump, but that means the pump was different again since i had to use a different one last time too. Ultraguge recorded 10.594 gallons used and the pump read 10.683 for a 0.089 variation, which is great, because it suggests that using the O2 sensor reading to know when I am in DFCO, instead of the instant FE reading, might be more precise. I'll need more data, using the same pump a few times in a row.
2014-09-03 678.57 mi
1092.05 km
10.294 gal (US)
8.57 gal (Imp)
38.97 L
346.91 kWh
$3.639
($37.46 total for this fill)
65.92 mpg (US)
79.18 mpg (Imp)
3.57 L/100 km
1.52 gal (US)/100 mi
511.24 Wh/mi
The smog test was done on this tank, and a lot of charging time, since it sat off the road for 10 or 12 days. And I could not get my usual pump, so I cannot be sure there isn't significant pumping variation.

ELECTRIC USE: 4.30 kwh on the charger = 157.808 miles/kwh.

FILL-UP DETAILS: At fill-up, the stock odometer indicated 659.45 miles, which equals the entered distance when calibrated at 1.029. See OEM odometer calibration thread here. Fuel pumping details: Costco pump 7, 87 octane, slowest fill rate, stopping at first click.
2014-08-17 424.719 mi
683.52 km
6.045 gal (US)
5.03 gal (Imp)
22.88 L
203.72 kWh
$3.739
($22.6 total for this fill)
70.26 mpg (US)
84.44 mpg (Imp)
3.35 L/100 km
1.42 gal (US)/100 mi
479.66 Wh/mi
It was a short tank, because I want to prep for smog test. At least I got my 70+ mpg goal for the summer.

ELECTRIC USE: 2.44 kwh on the charger = 174.065 miles/kwh.

FILL-UP DETAILS: At fill-up, the stock odometer indicated 412.75 miles, which equals the entered distance when calibrated at 1.029. See OEM odometer calibration thread here. Fuel pumping details: Costco pump 5, 87 octane, slowest fill rate, stopping at first click.
2014-07-26 736.198 mi
1184.8 km
11.109 gal (US)
9.25 gal (Imp)
42.05 L
374.37 kWh
$3.859
($42.87 total for this fill)
66.27 mpg (US)
79.59 mpg (Imp)
3.55 L/100 km
1.51 gal (US)/100 mi
508.52 Wh/mi
Apparently, even powering-up an iPod Touch from the car battery twice and playing the radio more too, my redesigned grill block pretty dramatically reduced kwh usage from the grid. The radiator fan must not have come on much.

ELECTRIC USE: 3.04 kwh on the charger = 242.17 miles/kwh.

FILL-UP DETAILS: At fill-up, the stock odometer indicated 715.45 miles, which equals the entered distance when calibrated at 1.029. See OEM odometer calibration thread here. Fuel pumping details: Costco pump 5, 87 octane, slowest fill rate, stopping at first click.
2014-07-12 725.342 mi
1167.32 km
10.578 gal (US)
8.81 gal (Imp)
40.04 L
356.48 kWh
$3.899
($41.24 total for this fill)
68.57 mpg (US)
82.33 mpg (Imp)
3.43 L/100 km
1.46 gal (US)/100 mi
491.46 Wh/mi
Again used very little DFCO and got better FE. Instead if i needed to generate power in deceleration scenarios, I cut the injectors and kept them off while the car coasted in gear, alternator on, and throttle wide open if i was looking for better speed or engine cooling.

ELECTRIC USE: 4.96kwh on the charger. 146.238 miles/kwh. Frequent cycles of the electric radiator fan in this heat are decreasing the miles/kwh.

FILL-UP DETAILS: At fill-up, the stock odometer indicated 704.9 miles, which equals the entered distance when calibrated at 1.029. See OEM odometer calibration thread here. Fuel pumping details: Costco pump 5, 87 octane, slowest fill rate, stopping at first click.
2014-06-19 708.724 mi
1140.58 km
10.633 gal (US)
8.85 gal (Imp)
40.25 L
358.33 kWh
$3.959
($42.1 total for this fill)
66.65 mpg (US)
80.08 mpg (Imp)
3.53 L/100 km
1.5 gal (US)/100 mi
505.6 Wh/mi
First 700+ mile tank ever. Used very little DFCO this time, and got better FE. I am not clear on why that is.

ELECTRIC USE: 5.0kwh on the charger. 141.745 miles per kwh. I think my heavy use of electric cooling in this heat is the culprit behind the greatly decreased kwh/mile economy.

FILL-UP DETAILS: At fill-up, the stock odometer indicated 688.75 miles, which equals the entered distance when calibrated at 1.029. See OEM odometer calibration thread here. Fuel pumping details: Costco pump 5, 87 octane, slowest fill rate, stopping at first click.
2014-05-28 656.71 mi
1056.87 km
10.436 gal (US)
8.69 gal (Imp)
39.5 L
351.69 kWh
$3.979
($41.52 total for this fill)
62.93 mpg (US)
75.57 mpg (Imp)
3.74 L/100 km
1.59 gal (US)/100 mi
535.53 Wh/mi
Either DFCO does not work on the DX Civic, or the shift points I have been experimenting with are counter productive. Ever since using DFCO extensively a few tanks ago my UG fuel use calibration has been off significantly. Even though I am using the same pump as before DFCO, the pump always shows more fuel used than the UG shows. Something is not right. At this time of year normally my FE is climbing.

ELECTRIC USE: 4.03kwh on the charger. 162.96 miles per kwh. This low kwh/mile number might reflect that I charged at work just before filling the tank. Normally I charge at home, which means I get gas, record the data, and then charge.

FILL-UP DETAILS: At fill-up, the stock odometer indicated 638.2 miles, which equals the entered distance when calibrated at 1.029. See OEM odometer calibration thread here. Fuel pumping details: Costco pump 5, 93 octane, slowest fill rate, stopping at first click. A problem with the pumps at Costco meant they were selling premium for the price of regular. Lucky day!
2014-05-09 671.783 mi
1081.13 km
10.688 gal (US)
8.9 gal (Imp)
40.46 L
360.19 kWh
$4.059
($43.38 total for this fill)
62.85 mpg (US)
75.48 mpg (Imp)
3.74 L/100 km
1.59 gal (US)/100 mi
536.17 Wh/mi
Lots of DFCO alternator-on power generation during engine braking down long hills that end in stop signs and traffic lights and such. Need to check tire pressure (haven't in months).

3.28kwh on the charger. 204.81 miles per kwh.

At fill-up, the stock odometer indicated 652.85 miles, which equals the entered distance when calibrated at 1.029. See OEM odometer calibration thread here. Fuel pumping details: Costco pump 5, 87 octane, slowest fill rate, stopping at first click.
2014-04-21 652.39 mi
1049.92 km
10.298 gal (US)
8.57 gal (Imp)
38.98 L
347.04 kWh
$4.199
($43.24 total for this fill)
63.35 mpg (US)
76.12 mpg (Imp)
3.71 L/100 km
1.58 gal (US)/100 mi
531.95 Wh/mi
First full tank with heavy use of DFCO. Highest miles/kwh on the charger I have ever gotten.

3.47 kwh on the charger. 188.01 miles/kwh

At fill-up, the stock odometer indicated 634.0 miles, which equals the entered distance when calibrated at 1.029. See OEM odometer calibration thread here. Fuel pumping details: Costco pump 5, 87 octane, slowest fill rate, stopping at first click.
2014-03-30 626.76 mi
1008.67 km
10.021 gal (US)
8.34 gal (Imp)
37.93 L
337.71 kWh
$3.929
($39.37 total for this fill)
62.54 mpg (US)
75.15 mpg (Imp)
3.76 L/100 km
1.6 gal (US)/100 mi
538.82 Wh/mi
Late in this tank, I started using higher shift points, as high as 2700 in second, 2500 in third, and 2400 in 4th. I also extensively used DFCO throughout instead of engine off coasting and braking. DFCO was for engine cooling and power generation. I turned the alternator on only during DFCO. The result is the lowest reading on the charger I have ever had for a tank, and FE about the same or slightly lower over the last several tanks. The higher shift points might have been the reason for the FE drop, or not. Can't tell.

3.37 kwh on the charger. 185.98 miles/kwh

At fill-up, the stock odometer indicated 609.1 miles, which equals the entered distance when calibrated at 1.029. See OEM odometer calibration thread here. Fuel pumping details: Costco pump 5, 87 octane, slowest fill rate, stopping at first click.
2014-03-18 638.19 mi
1027.07 km
10.041 gal (US)
8.36 gal (Imp)
38.01 L
338.38 kWh
$3.899
($39.15 total for this fill)
63.56 mpg (US)
76.34 mpg (Imp)
3.7 L/100 km
1.57 gal (US)/100 mi
530.22 Wh/mi
Last bunch of days I was off work and the weather was sweet. Decided to play around with turning alt on during DFCO. Also used a little engine-off, in-gear deceleration for charging with the alt and cooling engine when it got up to 199+ degrees. The cooling technique is great.

4.94 kwh on the charger. 129.19 miles/kwh.

At fill-up, the stock odometer indicated 620.2 miles, which equals the entered distance when calibrated at 1.029. See OEM odometer calibration thread here. Fuel pumping details: Costco pump 5, 87 octane, slowest fill rate, stopping at first click.
2014-03-01 649.3 mi
1044.95 km
10.352 gal (US)
8.62 gal (Imp)
39.19 L
348.86 kWh
$3.799
($39.33 total for this fill)
62.72 mpg (US)
75.32 mpg (Imp)
3.75 L/100 km
1.59 gal (US)/100 mi
537.29 Wh/mi
Cool mornings. Some torrential rains. Lots of freeway. But I do some radical hypermiling on some runs to keep the average up. This car is still a long way from the goal of 60+ mpg at posted speeds during the winter. Summer is easy. Winter, even a Cali winter, is hard on the averages.

4.22 kwh on the charger. 153.86 miles/kwh.

At fill-up, the stock odometer indicated 631.0 miles, which equals the entered distance when calibrated at 1.029. See OEM odometer calibration thread here. Fuel pumping details: Costco pump 5, 87 octane, slowest fill rate, stopping at first click.
2014-02-14 630.26 mi
1014.31 km
10.353 gal (US)
8.62 gal (Imp)
39.19 L
348.9 kWh
$3.639
($37.67 total for this fill)
60.88 mpg (US)
73.12 mpg (Imp)
3.86 L/100 km
1.64 gal (US)/100 mi
553.58 Wh/mi
Colder mornings, cold engine straight to the freeway. Fewer warm days. No gentle midday freeway commute to give high mileage to the average, like previous tank.

5.21 kw on the charger. 120.97 miles/kwh.

At fill-up, the stock odometer indicated 612.5 miles, which equals the entered distance when calibrated at 1.029. See OEM odometer calibration thread here. Fuel pumping details: Costco pump 5, 87 octane, slowest fill rate, stopping at first click.
2014-01-27 635 mi
1021.93 km
10.126 gal (US)
8.43 gal (Imp)
38.33 L
341.25 kWh
$3.439
($34.82 total for this fill)
62.71 mpg (US)
75.33 mpg (Imp)
3.75 L/100 km
1.59 gal (US)/100 mi
537.4 Wh/mi
Lots of chilly morning drives with the cold engine directly onto the freeway, and a problem with tire valve but the numbers are gret because of warm days and freeway commutes to LA that gave me a few hundred miles at 65mpg.

5.19kwh on charger (though half was free from work). 107.45 miles/kwh.

At fill-up, the stock odometer indicated 617.1 miles, which equals the entered distance when calibrated at 1.029. See OEM odometer calibration thread here. Fuel pumping details: Costco pump 5, 87 octane, slowest fill rate, stopping at first click.
2014-01-11 659.898 mi
1062 km
10.573 gal (US)
8.8 gal (Imp)
40.02 L
356.31 kWh
$3.539
($37.42 total for this fill)
62.41 mpg (US)
74.99 mpg (Imp)
3.77 L/100 km
1.6 gal (US)/100 mi
539.95 Wh/mi
Love the zero-toe alignment and the improved wheel skirts, which are tucked closer in to the car body. Car is running great.

Plugging in for free electricity at work is cool too, though I am monitoring it for notation here.

Kwh = 3.98 x $0.15/kwh = $0.60

At fill-up, the stock odometer indicated 641.1 miles, which equals the entered distance when calibrated at 1.029. See OEM odometer calibration thread here. Fuel pumping details: Costco pump 5, 87 octane, slowest fill rate, stopping at first click.
2013-12-28 654 mi
1052.51 km
10.464 gal (US)
8.71 gal (Imp)
39.61 L
352.64 kWh
$3.519
($36.82 total for this fill)
62.5 mpg (US)
75.09 mpg (Imp)
3.76 L/100 km
1.6 gal (US)/100 mi
539.2 Wh/mi
Nicer weather on a lot of afternoons, but very cold mornings in the 40s.

Kwh = 5.02 x $0.15/kwh = $0.70

At fill-up, the stock odometer indicated 635.55 miles, which equals the entered distance when calibrated at 1.029. See OEM odometer calibration thread here. Fuel pumping details: Costco pump 5, 87 octane, slowest fill rate, stopping at first click.
2013-12-12 627.43 mi
1009.75 km
10.408 gal (US)
8.67 gal (Imp)
39.4 L
350.75 kWh
$3.499
($36.42 total for this fill)
60.28 mpg (US)
72.37 mpg (Imp)
3.9 L/100 km
1.66 gal (US)/100 mi
559.03 Wh/mi
Some morning commutes that started in the dark in temps as low as 39* F all the way up to the balmy 43 degrees. Winter gas. Tire pressure dlown as low as 51psi on the cold mornings. More low-rpm 35mph cruising for warm-up or power generation. More freeway for school drop-off ontime arrivals... and there you go! Lower than usual. On the plus side, a couple days ago I got a free of charge spot to plug-in at work. And so I moved my kill-a-watt in the car now, and the power I get at work is tracked as well as what I get at home, even though I don't actually pay for some of the power. knock on wood ...

5.77kwh x $0.15 = $0.87

At fill-up, the stock odometer indicated 609.75 miles, which equals the entered distance when calibrated at 1.029. See OEM odometer calibration thread here. Fuel pumping details: Costco pump 5, 87 octane, slowest fill rate, stopping at first click.
2013-11-20 645.903 mi
1039.48 km
10.203 gal (US)
8.5 gal (Imp)
38.62 L
343.84 kWh
$3.419
($34.88 total for this fill)
63.31 mpg (US)
75.99 mpg (Imp)
3.72 L/100 km
1.58 gal (US)/100 mi
532.34 Wh/mi
13" wheels with new Michelin Defenders 175/70-R13s on front and recalibrated odometer readout. I like the tires fine.

3.51kwh x 0.15/kwh = $0.53

At fill-up, the stock odometer indicated 627.7 miles, which equals the entered distance when calibrated at 1.029. See OEM odometer calibration thread here. Fuel pumping details: Costco pump 5, 87 octane, slowest fill rate, stopping at first click.
2013-11-08 465.7 mi
749.47 km
7.1 gal (US)
5.91 gal (Imp)
26.88 L
239.27 kWh
$3.479
($24.7 total for this fill)
65.59 mpg (US)
78.8 mpg (Imp)
3.59 L/100 km
1.52 gal (US)/100 mi
513.79 Wh/mi
An early fill so I can have a full tank on the trip to El Mirage. Going to install 13" wheels with new Michelin Defenders 175/70-R13s on front and recalibrate odometer readout.

3.67kwh x 0.15/kwh = $0.55

At fill-up, the stock odometer indicated 441.4 miles, which equals the entered distance when calibrated at 1.055. See OEM odometer calibration thread here. Fuel pumping details: Costco pump 5, 87 octane, slowest fill rate, stopping at first click.
2013-10-26 681.64 mi
1096.99 km
10.29 gal (US)
8.57 gal (Imp)
38.95 L
346.77 kWh
$3.599
($37.03 total for this fill)
66.24 mpg (US)
79.54 mpg (Imp)
3.55 L/100 km
1.51 gal (US)/100 mi
508.73 Wh/mi
Lots of freeway, more with headlights on, colder mornings.

UG fuel reading was 10.6 gallons

KWH: 4.74 x 0.14 = $0.66

At fill-up, the stock odometer indicated 646.1 miles, which equals the entered distance when calibrated at 1.055. See OEM odometer calibration thread here. Fuel pumping details: Costco pump 5, 87 octane, slowest fill rate, stopping at first click.
2013-10-08 634.8 mi
1021.61 km
9.916 gal (US)
8.26 gal (Imp)
37.54 L
334.17 kWh
$3.759
($37.27 total for this fill)
64.02 mpg (US)
76.85 mpg (Imp)
3.67 L/100 km
1.56 gal (US)/100 mi
526.42 Wh/mi
I changed filling stations, seeking the cheapest price rather than pump predictability. My UG, which is well calibrated for my usual pump, said I used only 9.54 gallons, but the Costco pump said 9.916, so that is what I enter. And it is E10 gasoline (yuck) so I don't know if I'll go back, just because the price is $0.04 less than some of the other stations around.

Lots of early morning freeway commuting and school drop-off.

I messed up the kwh reading on the charger because I ran my chainsaw and my table saw on that extension cord.

At fill-up, the stock odometer indicated 601.7 miles, which equals the entered distance when calibrated at 1.055. See OEM odometer calibration thread here. Fuel pumping details: Costco, 87 octane, slowest fill rate, stopping at first click.
2013-09-18 664.23 mi
1068.97 km
9.944 gal (US)
8.28 gal (Imp)
37.64 L
335.11 kWh
$4.119
($40.96 total for this fill)
66.8 mpg (US)
80.22 mpg (Imp)
3.52 L/100 km
1.5 gal (US)/100 mi
504.51 Wh/mi
Lots of early morning freeway commuting and school drop-off waiting. Last half of tank was with the new wheel skirts on.

3.61 kwh on charger. (3.61 x 0.14 = $0.51)

At fill-up, the stock odometer indicated 629.6 miles, which equals the entered distance when calibrated at 1.055. See OEM odometer calibration thread here. Fuel pumping details: Harbor pump #3, 87 octane, slowest fill rate, stopping at first click.
2013-08-28 691.98 mi
1113.63 km
10.155 gal (US)
8.46 gal (Imp)
38.44 L
342.22 kWh
$3.899
($39.59 total for this fill)
68.14 mpg (US)
81.79 mpg (Imp)
3.45 L/100 km
1.47 gal (US)/100 mi
494.55 Wh/mi
Enjoying driving the car at more normal speeds, and more often on the freeway. The gearing is great since the transmission swap.

10.05kwh x 0.14 = $1.41

At fill-up, the stock odometer indicated 655.9 miles, which equals the entered distance when calibrated at 1.055. See OEM odometer calibration thread here. Fuel pumping details: Harbor pump #3, 87 octane, slowest fill rate, stopping at first click.
2013-07-20 630.26 mi
1014.31 km
9.647 gal (US)
8.03 gal (Imp)
36.52 L
325.1 kWh
$4.199
($40.51 total for this fill)
65.33 mpg (US)
78.49 mpg (Imp)
3.6 L/100 km
1.53 gal (US)/100 mi
515.82 Wh/mi
First full tank with hub bearing unit repaired. Lots of testing in this tank on freeways, without EOC. Installed brake drag reduction clips last 97 miles and averaged 67+ mpg in last hundred miles.

Also used 3.81kwh in charger, totaling $0.53 for the tank.

Rode bicycle 11 miles I normally drive. At fill-up, the stock odometer indicated 597.4 miles, which equals the entered distance when calibrated at 1.055. See OEM odometer calibration thread here. Fuel pumping details: Harbor pump #3, 87 octane, slowest fill rate, stopping at first click.
2013-07-05 637.01 mi
1025.17 km
9.86 gal (US)
8.21 gal (Imp)
37.32 L
332.28 kWh
$4.139
($40.81 total for this fill)
64.61 mpg (US)
77.59 mpg (Imp)
3.64 L/100 km
1.55 gal (US)/100 mi
521.62 Wh/mi
Used 8.02kwh on charger, for $1.12

Replaced hub bear unit during last 30 miles of the tank (coasts much better now). Replaced two ball joints, re-seated trans oil seal. Also rode bicycle for 63 miles I would normally have driven. At fill-up, the stock odometer indicated 603.8 miles, which equals the entered distance when calibrated at 1.055. See OEM odometer calibration thread here. Fuel pumping details: Harbor pump #3, 87 octane, slowest fill rate, stopping at first click.
2013-06-08 657.05 mi
1057.42 km
9.845 gal (US)
8.2 gal (Imp)
37.27 L
331.78 kWh
$4.059
($39.96 total for this fill)
66.74 mpg (US)
80.13 mpg (Imp)
3.52 L/100 km
1.5 gal (US)/100 mi
504.95 Wh/mi
Weather is warmer, I am driving faster and more on the freeway than before the tranny swap a few tanks ago. I have discovered that I can sometimes cruise at 55 mph getting anywhere from 58-74 mpg, depending on conditions. Stock odometer said 622.8 that multiplied by 1.055 equals the entered distance. See OEM odometer calibration thread here. Fuel pumping details: Harbor pump #3, 87 octane, slowest fill rate, stopping at first click.
2013-05-24 603.9 mi
971.88 km
8.964 gal (US)
7.46 gal (Imp)
33.93 L
302.09 kWh
$4.099
($36.74 total for this fill)
67.37 mpg (US)
80.95 mpg (Imp)
3.49 L/100 km
1.48 gal (US)/100 mi
500.23 Wh/mi
The OEM odometer read 572.45, so the distance entered is after calibration with 1.055 calibration multiplier. I tested the calibration across 144 miles today using ridewithgps.com and got about a 5.5% undercount on the stock odometer again. I'm going to consider my calibration reliable now. See OEM odometer readings calibration thread here. Fuel pumping details: Harbor pump #3, 87 octane, slowest fill rate, stopping at first click.
2013-05-11 632.1 mi
1017.27 km
9.572 gal (US)
7.97 gal (Imp)
36.23 L
322.58 kWh
$4.119
($39.43 total for this fill)
66.04 mpg (US)
79.31 mpg (Imp)
3.56 L/100 km
1.51 gal (US)/100 mi
510.33 Wh/mi
The '93 CX transmission is working out well, though I still have to reinstall the splash guard, which I think will bring my IAT up to the levels I would have expected. I get to stay over 60mpg while driving much more on the freeway and more often at the speedlimits on the surface roads. But the weather is much warmer, and these are calibrated readings. OEM odometer's actual reading was 599.15 (multiplied by 1.055 to compensate for wheels/tires). Without calibration the FE would be 62.594 mpg. In reality my last log entries with the DX tranny should be calibrated too, since the VSS, speedo gears, and wheel/tires are the same. Turns out, my odo has been under counting distance for years.
Pumping details: Harbor pump #3, 87 octane, slowest fill rate, stopping at first click.
2013-04-22 637.91 mi
1026.62 km
9.578 gal (US)
7.98 gal (Imp)
36.26 L
322.78 kWh
$3.999
($38.3 total for this fill)
66.6 mpg (US)
79.94 mpg (Imp)
3.53 L/100 km
1.5 gal (US)/100 mi
506 Wh/mi
First full tank with taller CX transmission. Weather is warmer, but I am driving a bit faster. More often on the freeway at 60+ mph to test and enjoy the taller gearing. My previous log entry probably an under-states FE because I went to a second click of the pump, refusing to believe the ~9.5 gallon reading on the pump since my UG said about 10.0 gallons. This time the UG reading was 10.078 gallons, so I calibrated the UG fuel measurement to match the pump. I also calibrated my distance reading. The stock ODO read 604.65 miles but using gps I have a multiplier of 1.055, which yields about 637.91. If at some point this calibration is proved incorrect, I'll change these entries. Pumping details: Harbor pump #3, 87 octane, slowest fill rate, stopping at first click.
2013-04-03 620 mi
997.79 km
9.7 gal (US)
8.08 gal (Imp)
36.72 L
326.89 kWh
$4.159
($40.34 total for this fill)
63.92 mpg (US)
76.73 mpg (Imp)
3.68 L/100 km
1.56 gal (US)/100 mi
527.24 Wh/mi
1993 CX transmission installed at 410 miles. Throw-out bearing noise and ISB noise gone. But the loudest bearing noise I had turns out to be the hub bearing unit on front driver side. Also, I calibrated the actual odometer reading at fill-up (reading was 609.5). The purpose is to compensate for my larger than 1993 stock wheels/tires. I settled on a multiplier of 1.055 by comparing odo to a set route using ridewithgps.com. 410 miles + (199.5 miles * 1.055) = 620 miles. So I see improved FE over recent fills, but I am not sure the trans is the difference since I am still learning how to hypermile it. And the weather has been warmer. Pumping details: Harbor pump #3, 87 octane, slowest fill rate, stopping at first click, but then went to a second click. Pump had read about 9.5 gallons but I didn't believe the number.
2013-03-03 601.05 mi
967.3 km
9.805 gal (US)
8.17 gal (Imp)
37.12 L
330.43 kWh
$4.359
($42.74 total for this fill)
61.3 mpg (US)
73.57 mpg (Imp)
3.84 L/100 km
1.63 gal (US)/100 mi
549.75 Wh/mi
Fewer starter solenoid fails. Still running the original DX transmission with the bearing noise (and I'm sure increased friction losses). Tires were down to about 55psi (60 is my normal). Serious hypermiling to make up for problems and cold, though some days are warm like Spring now. Pumping details: Harbor pump #3, 87 octane, slowest fill rate, stopping at first click.
2013-02-08 565.3 mi
909.76 km
9.681 gal (US)
8.06 gal (Imp)
36.65 L
326.25 kWh
$4.199
($40.65 total for this fill)
58.39 mpg (US)
70.14 mpg (Imp)
4.03 L/100 km
1.71 gal (US)/100 mi
577.13 Wh/mi
Transmission still needs replacing. Starter motor solenoid acting up after 200K miles, so I have to keep it running more often at long lights and use freeways more. Tires are probably lower pressure than usual. Pumping details: Harbor pump #3, 87 octane, slowest fill rate, stopping at first click.
2013-01-17 616.5 mi
992.16 km
9.628 gal (US)
8.02 gal (Imp)
36.45 L
324.46 kWh
$3.779
($36.38 total for this fill)
64.03 mpg (US)
76.87 mpg (Imp)
3.67 L/100 km
1.56 gal (US)/100 mi
526.29 Wh/mi
Driving much slower to compensate for cold. Though the UG said I used 10.1 gallons for about 60 or 61 mpg, the pump rules. So though I think this fuel log entry is slightly high, I'll post it. Pumping details: Harbor pump #3, 87 octane, slowest fill rate, stopping at first click.
2012-12-19 563.65 mi
907.11 km
9.113 gal (US)
7.59 gal (Imp)
34.5 L
307.11 kWh
$3.599
($32.8 total for this fill)
61.85 mpg (US)
74.26 mpg (Imp)
3.8 L/100 km
1.62 gal (US)/100 mi
544.86 Wh/mi
41 degrees at dawn this morning when my commute began. To keep over 60mpg average, I have had to slow down and am off the goal of averaging speed limits. Still need to find source of bearing noise (probably hub) but can't take daily driver off the road right now. Pumping details: Harbor pump #3, 87 octane, slowest fill rate, stopping at first click.
2012-11-29 628.6 mi
1011.63 km
10.112 gal (US)
8.42 gal (Imp)
38.28 L
340.77 kWh
$3.879
($39.22 total for this fill)
62.16 mpg (US)
74.66 mpg (Imp)
3.78 L/100 km
1.61 gal (US)/100 mi
542.11 Wh/mi
Colder. Running alternator for night driving more. New front brake pads. Replaced drive axles. Put 14" wheels back onto front because of immanent tire failure on one of the 13" wheels. Starter solenoid issues vanished, for now. Mystery bearing noise narrowed-down to either hub bearing units on front or transfer bearing for drive axles in the transmission. Been planning a transmission swap for better gearing. This may finally be the time. Pumping: Harbor pump #3, 89 octane, slowest fill rate, stopping at first click.
2012-11-02 634.8 mi
1021.61 km
9.5 gal (US)
7.91 gal (Imp)
35.96 L
320.15 kWh
$4.439
($42.17 total for this fill)
66.82 mpg (US)
80.25 mpg (Imp)
3.52 L/100 km
1.5 gal (US)/100 mi
504.33 Wh/mi
More intense hypermiling than is my preference and goal. Numbers will go down from here: it's cooler, I'm going to drive fast, and I'm developing starter issues that I can't resolve right away, so there will be more idling. Pumping: Harbor pump #3, 89 octane, slowest fill rate, stopping at first click.
2012-10-15 666.25 mi
1072.23 km
9.711 gal (US)
8.09 gal (Imp)
36.76 L
327.26 kWh
$4.839
($46.99 total for this fill)
68.61 mpg (US)
82.35 mpg (Imp)
3.43 L/100 km
1.46 gal (US)/100 mi
491.2 Wh/mi
Much cooler temps and more predawn driving in the dark, which usually means running the alternator. I compensated with very aggressive hypermiling and I stayed off the freeways almost entirely. I won't keep that up. This tank I wanted to see what I could get. Also used a couple oz MMO. Pumping: Harbor pump #3, 87 octane, slowest fill rate, stopping at first click.
2012-09-28 624.1 mi
1004.39 km
9.618 gal (US)
8.01 gal (Imp)
36.41 L
324.13 kWh
$4.279
($41.16 total for this fill)
64.89 mpg (US)
77.92 mpg (Imp)
3.63 L/100 km
1.54 gal (US)/100 mi
519.36 Wh/mi
First half of tank I did more freeway miles again, along the worst part of my commute, due to time. During latter half I stayed off freeway generally and the daily FE numbers were higher. I recently changed the O2 sensors too (had a CEL). And my ignition timing is back to stock. Last year advancing ignition timing 2 degrees was associated with a 3mpg gain (don't know if it was the cause). I'm wondering about advancing again.Pumping: Harbor pump #3, 89 octane, slowest fill rate, stopping at first click.
2012-09-06 516.1 mi
830.58 km
8.44 gal (US)
7.03 gal (Imp)
31.95 L
284.43 kWh
$4.279
($36.11 total for this fill)
61.15 mpg (US)
73.41 mpg (Imp)
3.85 L/100 km
1.64 gal (US)/100 mi
551.11 Wh/mi
Lowest tank since July 2011. I did mostly freeway driving this tank, so I knew it would be lower, because I seek an average of 60mph on the freeway. And I knew my UG was not calibrated correctly lately. But I didn't expect it to be this low, so I suspect pump error. Oh well. Pumping: Harbor pump #3, 89 octane, slowest fill rate, stopping at first click.
2012-08-25 734.75 mi
1182.47 km
10.711 gal (US)
8.92 gal (Imp)
40.55 L
360.96 kWh
$4.159
($44.55 total for this fill)
68.6 mpg (US)
82.37 mpg (Imp)
3.43 L/100 km
1.46 gal (US)/100 mi
491.27 Wh/mi
I think this reading was a pumping error or miscalculation, and I'm stuck with it as my new high. Heavy hypermiling to compensate for smog test stationary engine revving. HOT weather! Got more use of alternator delete, but battery is still a problem, so I am getting a free warranty replacement. Primary O2 sensor failed in last 30 miles of tank. Pumping: Harbor pump #3, 87 octane, slowest fill rate, stopping at first click. EDIT: I changed the fuel usage number to a higher one from 10.407 to 10.711, reducing my mpg from 70+ to about 68.6 because I think I made a mistake in my first calculation somehow. This new number is arbitrary, meant to just barely put the mpg below the Oct 15, 2012 fill.
2012-07-24 609.95 mi
981.62 km
9.14 gal (US)
7.61 gal (Imp)
34.6 L
308.02 kWh
$3.999
($36.55 total for this fill)
66.73 mpg (US)
80.15 mpg (Imp)
3.52 L/100 km
1.5 gal (US)/100 mi
504.99 Wh/mi
Alternator cut-off switch and charging issues resolved at 400 miles. Car running great again.
Pumping: Harbor pump #3, 89 octane, slowest fill rate, stopping at first click.
2012-07-04 634.1 mi
1020.49 km
9.843 gal (US)
8.2 gal (Imp)
37.26 L
331.71 kWh
$3.899
($38.38 total for this fill)
64.42 mpg (US)
77.33 mpg (Imp)
3.65 L/100 km
1.55 gal (US)/100 mi
523.12 Wh/mi
Alternator always on through last several hundred miles.
Pumping: Harbor pump #3, 89 octane, slowest fill rate, stopping at first click.
2012-06-02 659.8 mi
1061.85 km
9.929 gal (US)
8.27 gal (Imp)
37.59 L
334.61 kWh
$4.399
($43.68 total for this fill)
66.45 mpg (US)
79.78 mpg (Imp)
3.54 L/100 km
1.5 gal (US)/100 mi
507.14 Wh/mi
Harbor pump #3, 89 octane, slowest fill rate, stopping at first click. In the sweet spot: using freeways or streets as I please and averaging around the posted speed limits while pulling middle 60s MPG. Ultra Gauge reported 662.9 miles, 9.86 gallons, and 67.2 mpg. ODO/Pump calculation is the authority.
2012-05-15 702.3 mi
1130.24 km
10.5 gal (US)
8.74 gal (Imp)
39.75 L
353.85 kWh
$4.599
($48.29 total for this fill)
66.89 mpg (US)
80.35 mpg (Imp)
3.52 L/100 km
1.5 gal (US)/100 mi
503.84 Wh/mi
Much time on the freeway this tank. Redesigned airdam and new side skirts are working nicely I think. I can drive 55-65 mph pulse and glide, averaging about 60mph with the engine on nearly all the time, and get 64/65mpg.
2012-05-04 665.8 mi
1071.5 km
9.976 gal (US)
8.31 gal (Imp)
37.76 L
336.19 kWh
$4.319
($43.09 total for this fill)
66.74 mpg (US)
80.12 mpg (Imp)
3.52 L/100 km
1.5 gal (US)/100 mi
504.94 Wh/mi
Harbor pump #3, 89 octane, slowest fill rate, stopping at first click. Went back to 78% load target. First tank with new airdam on full time. ODO/UG and pump/UG calibration nearly perfect.
2012-04-16 650.05 mi
1046.15 km
10.041 gal (US)
8.36 gal (Imp)
38.01 L
338.38 kWh
$4.399
($44.17 total for this fill)
64.74 mpg (US)
77.76 mpg (Imp)
3.63 L/100 km
1.54 gal (US)/100 mi
520.54 Wh/mi
Harbor pump #3, 89 octane, slowest fill rate, stopping at first click. Experimented with 80-85% load pulses. Not sure it helped, but with new battery and reinstalled 3" airdam I am able to drive at or near all posted speed limits (on average during P&G), including on the freeway. Several cold and rainy days in this tank. UG recorded 651.0 miles and 9.94 gallons for 65.5mpg. But the ODO/Pump calculation always has the last word.
2012-04-03 629.5 mi
1013.08 km
9.876 gal (US)
8.22 gal (Imp)
37.38 L
332.82 kWh
$4.519
($44.63 total for this fill)
63.74 mpg (US)
76.58 mpg (Imp)
3.69 L/100 km
1.57 gal (US)/100 mi
528.71 Wh/mi
Harbor pump #3, 89 octane, slowest fill rate, stopping at first click. New Odyssey PC 1200 deep cycle battery installed at 200 miles, when tank average was 58mpg, due mostly to constantly running alternator trying to compensate for collapsing old battery. Last 100 miles was with airdam reinstalled. Only 7 miles DFCO (either engine on or off).
2012-03-14 614.1 mi
988.3 km
9.749 gal (US)
8.12 gal (Imp)
36.9 L
328.54 kWh
$4.519
($44.06 total for this fill)
62.99 mpg (US)
75.63 mpg (Imp)
3.73 L/100 km
1.59 gal (US)/100 mi
534.99 Wh/mi
Harbor pump #3, 89 octane, slowest fill rate, stopping at first click. Changed tranny fluid to Royal Purple 5w30 on March 4. Staying off the freeways until airdam and wheel skirts reinstalled. Also, battery seems to be deteriorating quickly: twenty four miles engine-off DFCO for power generation just to make my 12 mile commute. I also have to keep the alternator on for at least half my miles, and the freeway is quickly becoming out of the question because I run engine-on when on the freeway. UG said I burned 10.0 gallons.
2012-02-27 606.1 mi
975.42 km
9.519 gal (US)
7.93 gal (Imp)
36.03 L
320.79 kWh
$4.479
($42.64 total for this fill)
63.67 mpg (US)
76.43 mpg (Imp)
3.69 L/100 km
1.57 gal (US)/100 mi
529.27 Wh/mi
Habor pump #3, 89 octane, slowest fill rate, stopping at first click. UG said 60.0 mpg and 9.77 gallons. During engine-off DFCO, the UG loses miles relative to the ODO. UG said 586.9 miles. Plenty holding me back these days: battery seems weaker; plenty dark and chilly driving; no wheel skirts for the whole tank; and no airdam the last 100 miles. "Mystery Oil" mixed into the gas to clean fuel system. Staying off the freeways.
2012-02-13 603.55 mi
971.32 km
9.629 gal (US)
8.02 gal (Imp)
36.45 L
324.5 kWh
$3.999
($38.51 total for this fill)
62.68 mpg (US)
75.26 mpg (Imp)
3.75 L/100 km
1.6 gal (US)/100 mi
537.65 Wh/mi
Habor pump #3, slowest fill rate, stopping at first click. 89 octane fuel. No wheel skirts these days, and I do less EOC in order to keep the CAT lit more of the time. Much more night driving than usual due to late days at work. The new alternator off/on switch has been great for the night driving, and for engine off and engine on DFCO battery charging.
2012-01-30 600.4 mi
966.25 km
9.378 gal (US)
7.81 gal (Imp)
35.5 L
316.04 kWh
$3.939
($36.94 total for this fill)
64.02 mpg (US)
76.88 mpg (Imp)
3.67 L/100 km
1.56 gal (US)/100 mi
526.38 Wh/mi
Harbor pump #3, slowest rate, first click, 89 Octane. The new VX wheels, near-new Michelin Harmonys, which I think are lower rolling resistance than my old UltraGT tires, and bigger wheel skirts appear maybe to have helped. But 64.02 mpg surprised me because my UG claimed 61.4 on the tank. I had toyed with its fuel consumption calibration thinking I was making it more accurate. I guess I need to rethink that calibration. Wheel skirts off.
2012-01-16 611.95 mi
984.84 km
9.852 gal (US)
8.2 gal (Imp)
37.29 L
332.01 kWh
$3.879
($38.22 total for this fill)
62.11 mpg (US)
74.63 mpg (Imp)
3.79 L/100 km
1.61 gal (US)/100 mi
542.54 Wh/mi
Harbor pump #3. 89 octane fuel. The new ignition system is really helping. Driving fewer early mornings and refined acceleration technique for slightly better results. Driving more on freeways is fun and faster now because my aeromods really help me keep closer to the P&G MPG averages available through surface street routes. But the days are colder and that is pulling down my overall average.
2011-12-22 451.4 mi
726.46 km
7.14 gal (US)
5.95 gal (Imp)
27.03 L
240.62 kWh
$3.759
($26.84 total for this fill)
63.22 mpg (US)
75.87 mpg (Imp)
3.72 L/100 km
1.58 gal (US)/100 mi
533.05 Wh/mi
Harbor pump #3. Slowest fill setting. Stop on first click. 89 octane again. The colder morning weather and the running problems complicated this tank. Early tank average was 56mpg (test driving/running). But MPG numbers much better during later 350miles, after completing distributor overhaul (replaced ignition coil, ICM, Cap, Rotor, spark wires).
2011-11-30 663.1 mi
1067.16 km
10 gal (US)
8.33 gal (Imp)
37.85 L
337 kWh
$3.939
($39.39 total for this fill)
66.31 mpg (US)
79.6 mpg (Imp)
3.55 L/100 km
1.51 gal (US)/100 mi
508.22 Wh/mi
Harbor Pump #3. 89 Octane. Driving less at night to avoid lower temps and higher electrical load. Driving a bit more slowly too.
2011-11-08 601.3 mi
967.7 km
9.05 gal (US)
7.54 gal (Imp)
34.26 L
304.99 kWh
$3.819
($34.56 total for this fill)
66.44 mpg (US)
79.75 mpg (Imp)
3.54 L/100 km
1.51 gal (US)/100 mi
507.22 Wh/mi
New plugs working better, but showing new fuel fouling after only 450 miles.
2011-10-26 526.7 mi
847.64 km
8.019 gal (US)
6.68 gal (Imp)
30.36 L
270.24 kWh
$3.839
($30.78 total for this fill)
65.68 mpg (US)
78.85 mpg (Imp)
3.58 L/100 km
1.52 gal (US)/100 mi
513.08 Wh/mi
3.58L/100km. Fueled at the usual "beach pump #5," using the slowest fueling pace, and stopping at the first "click." I tanked-up early in order to get engine problems behind me. This tank average was as high as 67.4 before trouble with ignition system developed. UG calibration more accurately predicts the pump/ODO readings now: UG indicated 528.2 miles and 8.00 gallons.
2011-10-06 616.1 mi
991.52 km
9.386 gal (US)
7.82 gal (Imp)
35.53 L
316.31 kWh
$3.759
($35.28 total for this fill)
65.64 mpg (US)
78.79 mpg (Imp)
3.58 L/100 km
1.52 gal (US)/100 mi
513.41 Wh/mi
3.58L/100km. Beach pump #5, slowest fueling pace, stopped on first click... new high. Alt optional delete working out very nicely. I was still tweaking and adapting the install during this tank and only in the last 150 miles did I have it so I never needed the alternator. But then I encountered more cool days, two rainy days (one very rainy), and much more dark morning/night driving. Until these "mishaps" I was seeing 67/68 mpg in the last 150 miles. Still, overall, I should have seen a decline in FE this time of year, and the next tank may be still another new high. UG read 64.6 mpg, 9.47 gallons, 611.6 miles.
2011-09-21 608 mi
978.48 km
9.487 gal (US)
7.9 gal (Imp)
35.91 L
319.71 kWh
$3.939
($37.37 total for this fill)
64.09 mpg (US)
76.96 mpg (Imp)
3.67 L/100 km
1.56 gal (US)/100 mi
525.84 Wh/mi
3.67L/100km. Beach pump #5, slowest flow rate, to first click. Has been colder and wetter here on coast and dawn is later. Lightweight deep cycle battery mod done at mile 250 seemed to hurt FE until alternator mod done at mile 450. Also ran 91 octane fuel, but not convinced it's worth it in my car. This new tank is 89 octane. My driving style is now mostly speed limit range when in flow with traffic, a little below limits when alone. Calibration of UG much better: UG claimed 608.3 miles, 9.39 gals, 64.8 mpg.
2011-09-07 624.1 mi
1004.39 km
9.778 gal (US)
8.14 gal (Imp)
37.01 L
329.52 kWh
$4.079
($39.88 total for this fill)
63.83 mpg (US)
76.67 mpg (Imp)
3.68 L/100 km
1.57 gal (US)/100 mi
527.99 Wh/mi
= 3.69L/100km. Used beach pump #5 to refuel, as always. Weather was sometimes hot during this tank (approx 100*), but generally just warm to very warm (approx 80s-90s). Changed oil to 0w30 at about 375 miles through tank. Fine tuning WAI. Fine tuning pulse/load techniques. Stayed off the freeways. UG had read 64.9mpg at fill up. Bought premium grade with this fillup, thus the much higher price.
2011-08-10 617.3 mi
993.45 km
10.02 gal (US)
8.34 gal (Imp)
37.93 L
337.67 kWh
$3.679
($36.86 total for this fill)
61.61 mpg (US)
74.02 mpg (Imp)
3.82 L/100 km
1.62 gal (US)/100 mi
547.01 Wh/mi
3.82L/100km. Driving faster, driving about half miles on the freeways, loaded down once. I don't have drive under speedlimits often at all to get high FE results now. Car and technique improving. On average odo/pump calculated FE is 95.5% of UltraGauge reading.
2011-07-30 611.6 mi
984.27 km
10.38 gal (US)
8.64 gal (Imp)
39.29 L
349.81 kWh
$3.739
($38.81 total for this fill)
58.92 mpg (US)
70.79 mpg (Imp)
3.99 L/100 km
1.7 gal (US)/100 mi
571.96 Wh/mi
3.99L/100km. What a heart breaker. I should have made about 60.7 mpg or higher. I had needed to recover from an 80 mile freeway trip that ended the tank and during which the airdam was partially separated without my knowing. I knew something was up, so drove more slowly and heavily hypermiled along secondary roads, limping to the gas station. I didn't guess I could have fixed the whole problem in 5 seconds at the side of the freeway. Ugh.
2011-07-18 638.5 mi
1027.57 km
10.36 gal (US)
8.63 gal (Imp)
39.22 L
349.13 kWh
$3.739
($38.74 total for this fill)
61.63 mpg (US)
73.99 mpg (Imp)
3.82 L/100 km
1.62 gal (US)/100 mi
546.8 Wh/mi
3.82L/100km. Airdam and quarter-moon wheel skirts added midway. Readings, as always, are based on pump and stock odo. UG said 64.7 MPG. With the new aeromods and improved DWL techniques, I made the decision to drive a little faster and stay steady with traffic. So this tank includes more speedlimit driving than possibly any previous tank.
2011-06-29 621.5 mi
1000.21 km
10.27 gal (US)
8.55 gal (Imp)
38.88 L
346.1 kWh
$3.799
($39.02 total for this fill)
60.52 mpg (US)
72.69 mpg (Imp)
3.89 L/100 km
1.65 gal (US)/100 mi
556.88 Wh/mi
3.89L/100km. Could not reach the 700+ tank, but did get my first 60+ MPG. Adjustment to ignition timing and improved "driving with load" technique probably account for the new high. But there were a few high temp days as well, and that must have contributed too.

As of this fill-up, I have driven about 8500 miles since beginning ecomodding this car (I started a while before staring this log).
2011-06-18 612.5 mi
985.72 km
10.64 gal (US)
8.86 gal (Imp)
40.28 L
358.57 kWh
$3.939
($41.91 total for this fill)
57.57 mpg (US)
69.13 mpg (Imp)
4.09 L/100 km
1.74 gal (US)/100 mi
585.42 Wh/mi
First 600+ mile tank. First few hundred miles were only at 48mpg average. I got to this number by improving DWL technique and adjusting ignition timing. I think I averaged mid 60s mpg for the later portions of the tank. Next tank should be a record FE level for me. I'd like to hit 700+ for the tank and 62 or more per gallon.
2011-06-08 532.5 mi
856.98 km
9.318 gal (US)
7.76 gal (Imp)
35.27 L
314.02 kWh
$3.979
($37.08 total for this fill)
57.15 mpg (US)
68.62 mpg (Imp)
4.12 L/100 km
1.75 gal (US)/100 mi
589.71 Wh/mi
Back at beach pump #5. Ultra Gauge seems to undercount miles by about 2%. This time it read 523.3 miles. Need to calibrate distance. UG read 9.09gals for 57.5mpg. Odo and pump are final authority.
2011-05-28 571.5 mi
919.74 km
10.1 gal (US)
8.41 gal (Imp)
38.23 L
340.37 kWh
$3.999
($40.39 total for this fill)
56.58 mpg (US)
67.95 mpg (Imp)
4.16 L/100 km
1.77 gal (US)/100 mi
595.57 Wh/mi
My Ultra Gauge again read too high: 58.6mpg. And it under-counted miles by 11 this time. I continue to rely of the Odo and pump as final word.
2011-05-21 504.2 mi
811.43 km
8.927 gal (US)
7.43 gal (Imp)
33.79 L
300.84 kWh
$4.099
($36.59 total for this fill)
56.48 mpg (US)
67.86 mpg (Imp)
4.16 L/100 km
1.77 gal (US)/100 mi
596.67 Wh/mi
Fair amount of testing of two flat spoiler/wing designs and some colder than average mornings, with mist and rain. Also starter trouble. Not bad, considering.
2011-05-07 565 mi
909.28 km
9.582 gal (US)
7.98 gal (Imp)
36.27 L
322.91 kWh
$4.23
($40.53 total for this fill)
58.96 mpg (US)
70.8 mpg (Imp)
3.99 L/100 km
1.7 gal (US)/100 mi
571.52 Wh/mi
I'm back at my beach#5 pump, but the results confuse. Ultra gauge said I used 9.98 gals., drove 559.5 miles, for 56.0 mpg. Last time ultra gauge offered better mpg than the pump. I need to further calibrate UG. For now, I stick with the pump as final authority. Starting using more P&G and route planning. I avoid freeways now, and get better mpg as a result.
2011-04-27 518.5 mi
834.44 km
9.695 gal (US)
8.07 gal (Imp)
36.7 L
326.72 kWh
$4.159
($40.32 total for this fill)
53.48 mpg (US)
64.25 mpg (Imp)
4.4 L/100 km
1.87 gal (US)/100 mi
630.13 Wh/mi
Ultra Gauge, which I have MPG-calibrated, showed 9.41 gallons. Went to different station/pump than my usual beach#5. Redesigned and ABA tested the WAI at about 200 miles. Installed redesigned tire spats at 408 miles. 306 miles were on the freeway.
2011-04-20 222.5 mi
358.08 km
4.3 gal (US)
3.58 gal (Imp)
16.28 L
144.91 kWh
$4.159
($17.88 total for this fill)
51.74 mpg (US)
62.15 mpg (Imp)
4.55 L/100 km
1.93 gal (US)/100 mi
651.28 Wh/mi
Calibrated Ultra Gauge fairly well, I think. Weather was colder. I redesigned the WAI repeatedly--in prep for an A-B-A test of it. Sealed most front-end panel gaps with black silicone caulk at 38 miles. Created prototype tire spats at 144 miles. Drove faster on the freeway at times to see how speed effects the gauge readings at 60, 65, and 70 mph. My prototype tire spats MIGHT be a benefit at higher speeds. 90/223 miles were freeway.
2011-04-16 356.5 mi
573.73 km
6.749 gal (US)
5.62 gal (Imp)
25.55 L
227.44 kWh
$4.159
($28.07 total for this fill)
52.82 mpg (US)
63.43 mpg (Imp)
4.45 L/100 km
1.89 gal (US)/100 mi
637.98 Wh/mi
Preparing for a WAI test. Slightly early fill for data to calibrate Ultra Gauge (which still was off and showed 55.6 mpg, 354 miles, and 6.34 gallons burned). Also calibrated car's odometer using google maps: odo showed 99.6% to 99.8% of google's stated route distance. NEW MODS: Improvements to WAI at 68 miles and 295 miles seemed to bring warmer air (abt 40-50 degrees above the weather). HYPERMILING TECHNIQUES: EOC; bump starts; neutral coasting; some drafting; speed varied up to 65mph. Tank miles 38.7%hwy (actual).
2011-04-08 425.6 mi
684.94 km
8.214 gal (US)
6.84 gal (Imp)
31.09 L
276.81 kWh
$4.099
($33.67 total for this fill)
51.81 mpg (US)
62.22 mpg (Imp)
4.54 L/100 km
1.93 gal (US)/100 mi
650.4 Wh/mi
46%hwy/54%cty (actual). NEW MODS: Cut AC belt at fill-up; installed Ultra Gauge at 60 miles; removed power steering belt at 120 miles; Removed rear mudflaps at 225 miles. TECHNIQUE: Increased speeds to 65 mph sometimes, though usually 55. Drafting; EOC; DWL; neutral coasting. Ultra Gauge was reading 55.7mpg at fill-up, and since the power steering delete came along only after 120 miles, I think the next tank might be better than this one.
2011-03-29 354.2 mi
570.03 km
6.171 gal (US)
5.14 gal (Imp)
23.36 L
207.96 kWh
$4.05
($24.99 total for this fill)
57.4 mpg (US)
68.91 mpg (Imp)
4.1 L/100 km
1.74 gal (US)/100 mi
587.13 Wh/mi
No new mods. 93%hwy/7%cty (actual). Max speed 55 mph. EOC. Drafting. Last of the big highway driving for a couple months and so millage will come down again. More mods coming. Gas price estimated from memory.
2011-03-26 224.1 mi
360.65 km
4.295 gal (US)
3.58 gal (Imp)
16.26 L
144.74 kWh
$4.05
($17.39 total for this fill)
52.18 mpg (US)
62.6 mpg (Imp)
4.51 L/100 km
1.92 gal (US)/100 mi
645.87 Wh/mi
75%hwy/25%cty (actual); No new mods, just lots of highway driving again; EOC; max speed 55mph; some drafting. Refueled for 400mi trip. Gas price estimated from memory.
2011-03-24 283.7 mi
456.57 km
5.595 gal (US)
4.66 gal (Imp)
21.18 L
188.55 kWh
$4
($22.38 total for this fill)
50.71 mpg (US)
60.88 mpg (Imp)
4.64 L/100 km
1.97 gal (US)/100 mi
664.61 Wh/mi
No new mods. Slowed down hwy top speed to 55mph. 65%hwy/35%cty (actual). EOC. Some drafting behind conveniently slow trucks. But cold and rainy conditions lasted the whole tank. Gas price estimated from memory.
2011-03-21 412.6 mi
664.02 km
8.739 gal (US)
7.28 gal (Imp)
33.08 L
294.5 kWh
$4
($34.96 total for this fill)
47.21 mpg (US)
56.68 mpg (Imp)
4.98 L/100 km
2.12 gal (US)/100 mi
713.77 Wh/mi
Combined 32.3%hwy/67.7%%cty (actual); grille blocks added; mirror deletes introduced; increased hwy speed to 60mph from 53; and drove 68 miles EOC. At 250 miles I reduced the size of the grille block because the fan kept switching on. At 290 I removed the second outside mirror. At 350 I removed the front wheel mud flaps. The higher speeds on the freeway and in the city brought FE down notably. I expected speed over 55 would make a big difference, and so I compensated by beginning EOC. Gas price estimated from memory.
2011-03-11 405.5 mi
652.59 km
8.54 gal (US)
7.11 gal (Imp)
32.33 L
287.8 kWh
$3.9
($33.31 total for this fill)
47.48 mpg (US)
57.03 mpg (Imp)
4.95 L/100 km
2.11 gal (US)/100 mi
709.74 Wh/mi
Combined 40%hwy/60%cty (estimated); WAI modified for warmer; wiper delete added; 53mph hwy speed; and no EOC. Gas price estimated from memory.
2011-03-03 431.8 mi
694.91 km
9.54 gal (US)
7.94 gal (Imp)
36.11 L
321.5 kWh
$3.9
($37.21 total for this fill)
45.26 mpg (US)
54.38 mpg (Imp)
5.2 L/100 km
2.21 gal (US)/100 mi
744.56 Wh/mi
Combined 45%hwy/55%cty (estimated); WAI introduced; 53mph hwy speed; and no EOC. Gas price estimated from memory.
2011-02-17 418.2 mi
673.03 km
9.82 gal (US)
8.18 gal (Imp)
37.17 L
330.93 kWh
$3.8
($37.32 total for this fill)
42.59 mpg (US)
51.12 mpg (Imp)
5.52 L/100 km
2.35 gal (US)/100 mi
791.32 Wh/mi
50%hwy/50%cty (estimated); tire overinflate 4psi; 53mph hwy speed; and no EOC. EDIT: the tires were actually overinflated 9psi (faulty pressure gauge). Gas price estimated from memory.
2011-02-06 330 mi
531.08 km
10 gal (US)
8.33 gal (Imp)
37.85 L
337 kWh
$3.8
($38 total for this fill)
33 mpg (US)
39.62 mpg (Imp)
7.13 L/100 km
3.03 gal (US)/100 mi
1021.21 Wh/mi
This is not a real entry. It is just to represent the normal tank-to-tank combined cty/hwy average I tracked for years before finding this site. Beating the 2008 EPA standard by 3 mpg for 148,000 miles would mean about 425 gallons of gas. If I guesstimate $2.50/gal., I might have saved about $1060.00, but these estimates are so crude as to be kinda wild guesses, really.

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


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