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Fuel log graph
Efficiency log for: Bio Deezler (sold) - 2003 Volkswagen Jetta GLS TDI
  • Lifetime Fuel Economy: 48.8 mpg (US), 4.8 L/100 km, 58.6 mpg (Imp)
  • 90-day Fuel Economy: 50.8 mpg (US), 4.6 L/100 km, 61 mpg (Imp)
  • 3-tank Fuel Economy: 52 mpg (US), 4.5 L/100 km, 62.5 mpg (Imp)
  • EPA Combined Rating / % over rating: 38 mpg (US) / 33.6% (based on 90-day fuel economy)
  • Total fills: 36
  • Average cost per gal/L: $2.67 per gal (US); $0.00 per L (price data entered for 22 fill/s)
  • Average cost per fill: $37.79
  • Average distance cost: $0.05 per mi. / $0.03 per km
  • Total fuel used: 484.04 gal (US), 1832.3 L
  • Total distance traveled: 23637.9 mi. / 38041.5 km
  • Total cost: $831.29
  • Total fuel saved vs. EPA: 138 gal. (US) / 522.4 L
  • Total saved: $368.46 (based on avg. cost per gal./L)
  • Average tank distance: 656.6 mi. / 1056.7 km
Fill date Distance Fill amount Price Fuel Economy Details
2010-06-20 706.1 mi
1136.36 km
14.4 gal (US)
11.99 gal (Imp)
54.51 L
485.28 kWh
49.03 mpg (US)
58.89 mpg (Imp)
4.8 L/100 km
2.04 gal (US)/100 mi
687.27 Wh/mi
Estimated fill from home bio tank. New fuel sender/pump changed my tank level reading slightly (low fuel light on sooner).
2010-06-01 744.3 mi
1197.83 km
13.4 gal (US)
11.16 gal (Imp)
50.72 L
451.58 kWh
55.54 mpg (US)
66.69 mpg (Imp)
4.23 L/100 km
1.8 gal (US)/100 mi
606.72 Wh/mi
Hand-measured. 70-80mph hwy and 55-70mph 2-lanes.
2010-05-27 100 mi
160.93 km
2 gal (US)
1.67 gal (Imp)
7.57 L
67.4 kWh
50 mpg (US)
59.88 mpg (Imp)
4.7 L/100 km
2 gal (US)/100 mi
674 Wh/mi
Top off pre-Leelanau trip
2010-05-24 719 mi
1157.12 km
14.4 gal (US)
11.99 gal (Imp)
54.51 L
485.28 kWh
49.93 mpg (US)
59.97 mpg (Imp)
4.71 L/100 km
2 gal (US)/100 mi
674.94 Wh/mi
B50 at home. Fuel light at 683mi steady state.
2010-05-04 718.7 mi
1156.64 km
14.5 gal (US)
12.07 gal (Imp)
54.89 L
488.65 kWh
49.57 mpg (US)
59.54 mpg (Imp)
4.75 L/100 km
2.02 gal (US)/100 mi
679.91 Wh/mi
B50 from the home tank! Fill quantity is estimated....
2010-04-13 715.6 mi
1151.65 km
14.28 gal (US)
11.89 gal (Imp)
54.06 L
481.24 kWh
$3.09
($44.13 total for this fill)
50.11 mpg (US)
60.19 mpg (Imp)
4.69 L/100 km
2 gal (US)/100 mi
672.5 Wh/mi
Spring weather = driving for fun (fast) with the windows down. doh.
2010-03-25 768.2 mi
1236.3 km
15.09 gal (US)
12.56 gal (Imp)
57.12 L
508.53 kWh
$2.95
($44.52 total for this fill)
50.91 mpg (US)
61.16 mpg (Imp)
4.62 L/100 km
1.96 gal (US)/100 mi
661.98 Wh/mi
Wow, I didn't try to drive carefully whatsoever. Lots of 80 mph, late to work, eager to get home style driving.
2010-03-03 805 mi
1295.52 km
15.36 gal (US)
12.79 gal (Imp)
58.14 L
517.63 kWh
$2.85
($43.78 total for this fill)
52.41 mpg (US)
62.94 mpg (Imp)
4.49 L/100 km
1.91 gal (US)/100 mi
643.02 Wh/mi
A2-Traverse City-Bellaire-TC-A2 Plus work, work+Novi

Nothing special.
2010-02-25 730.2 mi
1175.14 km
14.65 gal (US)
12.2 gal (Imp)
55.46 L
493.71 kWh
$2.859
($41.88 total for this fill)
49.84 mpg (US)
59.85 mpg (Imp)
4.72 L/100 km
2.01 gal (US)/100 mi
676.13 Wh/mi
Nothing special, plenty of snow driving.
2010-02-10 717.9 mi
1155.35 km
14.3 gal (US)
11.91 gal (Imp)
54.13 L
481.91 kWh
$2.79
($39.9 total for this fill)
50.2 mpg (US)
60.28 mpg (Imp)
4.69 L/100 km
1.99 gal (US)/100 mi
671.28 Wh/mi
Not driving very carefully, but full front-lower grill block in place for whole tank. Some snowy days meant slower driving also.
2010-01-20 724.7 mi
1166.29 km
15.18 gal (US)
12.64 gal (Imp)
57.46 L
511.57 kWh
$2.899
($44.01 total for this fill)
47.74 mpg (US)
57.33 mpg (Imp)
4.93 L/100 km
2.09 gal (US)/100 mi
705.91 Wh/mi
2009-12-22 685.7 mi
1103.53 km
14.74 gal (US)
12.27 gal (Imp)
55.8 L
496.74 kWh
46.52 mpg (US)
55.88 mpg (Imp)
5.06 L/100 km
2.15 gal (US)/100 mi
724.43 Wh/mi
Dang, back to cold start trips. Need to get my coolant and oil heater use maximized.
2009-11-30 754.7 mi
1214.57 km
13.71 gal (US)
11.42 gal (Imp)
51.9 L
462.03 kWh
$2.89
($39.62 total for this fill)
55.05 mpg (US)
66.09 mpg (Imp)
4.27 L/100 km
1.82 gal (US)/100 mi
612.2 Wh/mi
Fill up back in A2 after one day driving to work and back.
2009-11-28 660 mi
1062.17 km
11.99 gal (US)
9.98 gal (Imp)
45.39 L
404.06 kWh
$2.69
($32.25 total for this fill)
55.05 mpg (US)
66.13 mpg (Imp)
4.27 L/100 km
1.82 gal (US)/100 mi
612.21 Wh/mi
Same B20 from Montgomery (on the way back north).
2009-11-24 719.7 mi
1158.24 km
13.1 gal (US)
10.91 gal (Imp)
49.59 L
441.47 kWh
$2.69
($35.24 total for this fill)
54.94 mpg (US)
65.97 mpg (Imp)
4.28 L/100 km
1.82 gal (US)/100 mi
613.41 Wh/mi
Found some quality B20 in Montgomery AL. Woot for the mileage. Not even trying, all 70-80 mph highway and one traffic jam.
2009-11-23 505.5 mi
813.52 km
10.09 gal (US)
8.4 gal (Imp)
38.19 L
340.03 kWh
$2.89
($29.16 total for this fill)
50.1 mpg (US)
60.18 mpg (Imp)
4.69 L/100 km
2 gal (US)/100 mi
672.66 Wh/mi
Fill-up before road trip to FL
2009-11-10 717.5 mi
1154.7 km
15.56 gal (US)
12.96 gal (Imp)
58.9 L
524.37 kWh
$2.89
($44.97 total for this fill)
46.11 mpg (US)
55.36 mpg (Imp)
5.1 L/100 km
2.17 gal (US)/100 mi
730.83 Wh/mi
I'm pretty sure I got more fuel in this time vs. last at the pump. Stupid foam. This whole tank was back on the STOCK downpipe.
2009-10-21 832 mi
1338.97 km
16.93 gal (US)
14.1 gal (Imp)
64.09 L
570.54 kWh
49.14 mpg (US)
59.01 mpg (Imp)
4.79 L/100 km
2.03 gal (US)/100 mi
685.75 Wh/mi
Wow. Shameful driving, lots of WOT to 100+. Actual fill could vary +/- 0.5gal as I used up some leftover bio jugs.
2009-09-29 444.3 mi
715.03 km
9.61 gal (US)
8 gal (Imp)
36.38 L
323.86 kWh
46.23 mpg (US)
55.54 mpg (Imp)
5.09 L/100 km
2.16 gal (US)/100 mi
728.92 Wh/mi
More terrible driving, unsure on exact fuel fill quantity
2009-09-18 642 mi
1033.2 km
13.59 gal (US)
11.32 gal (Imp)
51.44 L
457.98 kWh
47.24 mpg (US)
56.71 mpg (Imp)
4.98 L/100 km
2.12 gal (US)/100 mi
713.36 Wh/mi
Terrible driving style; fast accel, 80 mph hwy.
2009-08-30 719.4 mi
1157.76 km
15.25 gal (US)
12.7 gal (Imp)
57.73 L
513.93 kWh
47.17 mpg (US)
56.65 mpg (Imp)
4.99 L/100 km
2.12 gal (US)/100 mi
714.39 Wh/mi
Back to hand measured. Not sure if I feel comfortable applying a correction factor just yet...
2009-08-17 590 mi
949.51 km
11.21 gal (US)
9.33 gal (Imp)
42.43 L
377.78 kWh
$2.65
($29.71 total for this fill)
52.63 mpg (US)
63.24 mpg (Imp)
4.47 L/100 km
1.9 gal (US)/100 mi
640.31 Wh/mi
After trip to TC and back (65-80 mph cruising).
Re-filled with Randy's B99 in Fowlerville
2009-08-13 517 mi
832.03 km
10.4 gal (US)
8.66 gal (Imp)
39.37 L
350.48 kWh
49.71 mpg (US)
59.7 mpg (Imp)
4.73 L/100 km
2.01 gal (US)/100 mi
677.91 Wh/mi
Same driving as last tank - but filled at pump instead of hand measured!
2009-08-03 490 mi
788.58 km
10.45 gal (US)
8.7 gal (Imp)
39.56 L
352.17 kWh
46.89 mpg (US)
56.32 mpg (Imp)
5.02 L/100 km
2.13 gal (US)/100 mi
718.71 Wh/mi
Mostly highway at 75-85 mph, plus some hard city driving in Grand Haven. Rear diffuser now in place.
2009-07-30 396.2 mi
637.62 km
8.65 gal (US)
7.2 gal (Imp)
32.74 L
291.51 kWh
45.8 mpg (US)
55.03 mpg (Imp)
5.13 L/100 km
2.18 gal (US)/100 mi
735.76 Wh/mi
Some careful driving, some not at all. Top off before weekend trip.
2009-07-20 675 mi
1086.31 km
14.7 gal (US)
12.24 gal (Imp)
55.65 L
495.39 kWh
45.92 mpg (US)
55.15 mpg (Imp)
5.12 L/100 km
2.18 gal (US)/100 mi
733.91 Wh/mi
Fairly careful driving, but only realized that my rear belly pan was parachuting fairly badly at the very end of the tank. Though the stock bumper lip may not be much better....
2009-07-06 830.5 mi
1336.56 km
18.4 gal (US)
15.32 gal (Imp)
69.65 L
620.08 kWh
$2.69
($49.5 total for this fill)
45.14 mpg (US)
54.21 mpg (Imp)
5.21 L/100 km
2.22 gal (US)/100 mi
746.63 Wh/mi
Oy! What a struggle to get this tank done and measured. Switched from B20 to a B99 derived from recycled oils. I'm sure the BTU content/gal is much lower than the B20 I was using previously. Also had some high speed testing of the new 5th gear ratio, which didn't make the huge impact that my scan gauge said it did.
2009-05-18 778.5 mi
1252.87 km
16.1 gal (US)
13.41 gal (Imp)
60.95 L
542.57 kWh
$2.19
($35.26 total for this fill)
48.35 mpg (US)
58.05 mpg (Imp)
4.86 L/100 km
2.07 gal (US)/100 mi
696.94 Wh/mi
Had to add 2 gallons of old stored D2 to get to work and use up the old fuel, so actual fuel fill could vary +/- 0.5 gals....
2009-04-27 683 mi
1099.18 km
14.45 gal (US)
12.03 gal (Imp)
54.7 L
486.97 kWh
$2.19
($31.65 total for this fill)
47.27 mpg (US)
56.77 mpg (Imp)
4.98 L/100 km
2.12 gal (US)/100 mi
712.99 Wh/mi
First half of tank was with new wheels/tires. Probably should have filled up then before changing intake system, and MAF sensor. After the intake install, troubleshooting and acceleration testing probably wiped out any potential gains.
2009-04-11 392.9 mi
632.31 km
8.45 gal (US)
7.04 gal (Imp)
31.99 L
284.77 kWh
$2.19
($18.51 total for this fill)
46.5 mpg (US)
55.81 mpg (Imp)
5.06 L/100 km
2.15 gal (US)/100 mi
724.79 Wh/mi
Half tank to finish out the snow tires for the season. Michelin MXM4 Energy S8's got put on so I had to top off.
2009-03-29 643.7 mi
1035.93 km
13.42 gal (US)
11.17 gal (Imp)
50.8 L
452.25 kWh
$2.19
($29.39 total for this fill)
47.97 mpg (US)
57.63 mpg (Imp)
4.9 L/100 km
2.08 gal (US)/100 mi
702.58 Wh/mi
First tank with 206 deg. thermostat and zerostart coolant heater. Used the heater most mornings for just a couple hours.
Couple of coolant leaks after the t-stat change, but overall a smooth tank.
2009-03-06 661.5 mi
1064.58 km
14.3 gal (US)
11.91 gal (Imp)
54.13 L
481.91 kWh
$2.29
($32.75 total for this fill)
46.26 mpg (US)
55.54 mpg (Imp)
5.08 L/100 km
2.16 gal (US)/100 mi
728.51 Wh/mi
Most of tank was run with 3 bad glow plugs (= rough starts, slower warm-up)
2009-02-18 863.5 mi
1389.67 km
17.73 gal (US)
14.76 gal (Imp)
67.12 L
597.5 kWh
$2.39
($42.37 total for this fill)
48.7 mpg (US)
58.5 mpg (Imp)
4.83 L/100 km
2.05 gal (US)/100 mi
691.95 Wh/mi
Includes trip to Chicago and back, with 4.45 gals added in IN on return trip.
2009-02-06 639.6 mi
1029.34 km
14.17 gal (US)
11.8 gal (Imp)
53.64 L
477.53 kWh
$2.49
($35.28 total for this fill)
45.14 mpg (US)
54.2 mpg (Imp)
5.21 L/100 km
2.22 gal (US)/100 mi
746.61 Wh/mi
2009-01-23 696 mi
1120.1 km
15.65 gal (US)
13.03 gal (Imp)
59.24 L
527.41 kWh
$2.59
($40.53 total for this fill)
44.47 mpg (US)
53.42 mpg (Imp)
5.29 L/100 km
2.25 gal (US)/100 mi
757.77 Wh/mi
I think this tank included about 15 days with sub-zero temps. WTF!
2008-11-06 650 mi
1046.07 km
13.83 gal (US)
11.52 gal (Imp)
52.35 L
466.07 kWh
$3.39
($46.88 total for this fill)
47 mpg (US)
56.42 mpg (Imp)
5 L/100 km
2.13 gal (US)/100 mi
717.03 Wh/mi
Diesel is such a rip-off compared to gas! GRRRR

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


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