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Fuel log graph
Efficiency log for: Suby - 2006 Subaru Impreza 2.5i SportWagon
  • Lifetime Fuel Economy: 28.3 mpg (US), 8.3 L/100 km, 34 mpg (Imp)
  • 90-day Fuel Economy: 27.8 mpg (US), 8.5 L/100 km, 33.3 mpg (Imp)
  • 3-tank Fuel Economy: 28.4 mpg (US), 8.3 L/100 km, 34.1 mpg (Imp)
  • EPA Combined Rating / % over rating: 23.5 mpg (US) / 18.1% (based on 90-day fuel economy)
  • Total fills: 35
  • Average cost per gal/L: $3.89 per gal (US); $0.00 per L (price data entered for 35 fill/s)
  • Average cost per fill: $40.88
  • Average distance cost: $0.14 per mi. / $0.09 per km
  • Total fuel used: 367.48 gal (US), 1391.1 L
  • Total distance traveled: 10397.4 mi. / 16733 km
  • Total cost: $1,430.63
  • Total fuel saved vs. EPA: 75 gal. (US) / 283.9 L
  • Total saved: $291.75 (based on avg. cost per gal./L)
  • Average tank distance: 297.1 mi. / 478.1 km
Fill date Distance Fill amount Price Fuel Economy Details
2013-11-10 258.9 mi
416.66 km
9.5 gal (US)
7.91 gal (Imp)
35.96 L
320.15 kWh
$3.409
($32.39 total for this fill)
27.25 mpg (US)
32.73 mpg (Imp)
8.63 L/100 km
3.67 gal (US)/100 mi
1236.58 Wh/mi
Nothing special, staying with Regular grade, need to save the monies.
2013-10-23 324.6 mi
522.39 km
11.517 gal (US)
9.59 gal (Imp)
43.6 L
388.12 kWh
$3.549
($40.87 total for this fill)
28.18 mpg (US)
33.85 mpg (Imp)
8.35 L/100 km
3.55 gal (US)/100 mi
1195.69 Wh/mi
2013-08-07 360.3 mi
579.85 km
12.23 gal (US)
10.18 gal (Imp)
46.3 L
412.15 kWh
$3.799
($46.46 total for this fill)
29.46 mpg (US)
35.39 mpg (Imp)
7.98 L/100 km
3.39 gal (US)/100 mi
1143.91 Wh/mi
Used the LOD feature of my ScanGauge on this tank, well most of this tank, and discovered some opportunities for improved mileage.

Will use some LOD strategies on this fill up to try to get a better overall tank. No additives, regular fuel.
2013-07-10 376.6 mi
606.08 km
12.467 gal (US)
10.38 gal (Imp)
47.19 L
420.14 kWh
$3.599
($44.87 total for this fill)
30.21 mpg (US)
36.28 mpg (Imp)
7.79 L/100 km
3.31 gal (US)/100 mi
1115.61 Wh/mi
This was the first tank that I tried EOC. I noticed a difference in MPG but not sure it's worth the safety risk.

This fill-up has no additives, was regular (Mobil) gas, filled in the morning (before 7 am).
2013-05-26 420.9 mi
677.37 km
13.781 gal (US)
11.48 gal (Imp)
52.17 L
464.42 kWh
$3.99
($54.99 total for this fill)
30.54 mpg (US)
36.66 mpg (Imp)
7.7 L/100 km
3.27 gal (US)/100 mi
1103.4 Wh/mi
Prior tank had no additives, etc.
This fill-up was with Super and with Shell gas, no additives.
2013-05-06 386.3 mi
621.69 km
12.483 gal (US)
10.39 gal (Imp)
47.25 L
420.68 kWh
$3.599
($44.93 total for this fill)
30.95 mpg (US)
37.18 mpg (Imp)
7.6 L/100 km
3.23 gal (US)/100 mi
1089 Wh/mi
This tank had the first of some nice weather, still has winter tires, still needs an oil change.
I filled with Regular and used NO additives.
2013-04-19 369.3 mi
594.33 km
12.294 gal (US)
10.24 gal (Imp)
46.54 L
414.31 kWh
$3.499
($43.02 total for this fill)
30.04 mpg (US)
36.06 mpg (Imp)
7.83 L/100 km
3.33 gal (US)/100 mi
1121.88 Wh/mi
This last tank had additive.
This fill up was Mobil Regular gas with no additive.
2013-03-29 340.4 mi
547.82 km
12.037 gal (US)
10.02 gal (Imp)
45.57 L
405.65 kWh
$3.699
($44.52 total for this fill)
28.28 mpg (US)
33.97 mpg (Imp)
8.32 L/100 km
3.54 gal (US)/100 mi
1191.69 Wh/mi
This fill-up was 0.5 oz Syntek and on regular fuel.
2013-03-13 357.1 mi
574.7 km
12.668 gal (US)
10.55 gal (Imp)
47.95 L
426.91 kWh
$3.799
($48.13 total for this fill)
28.19 mpg (US)
33.85 mpg (Imp)
8.34 L/100 km
3.55 gal (US)/100 mi
1195.49 Wh/mi
This tank had no additives.
This fill-up has .25 oz of Syntek on Regular.
2013-02-01 314.5 mi
506.14 km
12.162 gal (US)
10.13 gal (Imp)
46.04 L
409.86 kWh
$4.179
($50.82 total for this fill)
25.86 mpg (US)
31.05 mpg (Imp)
9.1 L/100 km
3.87 gal (US)/100 mi
1303.21 Wh/mi
This tank had .25 oz of Syntek.
No additive on this fill-up.
2013-01-17 288.2 mi
463.81 km
10.988 gal (US)
9.15 gal (Imp)
41.59 L
370.3 kWh
$3.999
($43.94 total for this fill)
26.23 mpg (US)
31.5 mpg (Imp)
8.97 L/100 km
3.81 gal (US)/100 mi
1284.87 Wh/mi
Went back to super after seeing how badly the ScanGauge "thought" this tank was (24.6 mpg) when in actual figures, it was not.
Added another .25 oz on Syntek.
2012-12-29 345 mi
555.22 km
12.879 gal (US)
10.72 gal (Imp)
48.75 L
434.02 kWh
$3.779
($48.67 total for this fill)
26.79 mpg (US)
32.18 mpg (Imp)
8.78 L/100 km
3.73 gal (US)/100 mi
1258.03 Wh/mi
Filled up with mid-grade, started using the .25 oz instead of the ml measurement for Syntek.
2012-12-09 281.6 mi
453.19 km
10.291 gal (US)
8.57 gal (Imp)
38.96 L
346.81 kWh
$4.049
($41.67 total for this fill)
27.36 mpg (US)
32.86 mpg (Imp)
8.6 L/100 km
3.65 gal (US)/100 mi
1231.57 Wh/mi
No additives on this fuel up.
Filled with Mobil super.
2012-11-19 378.4 mi
608.98 km
13.551 gal (US)
11.28 gal (Imp)
51.3 L
456.67 kWh
$4.199
($56.9 total for this fill)
27.92 mpg (US)
33.55 mpg (Imp)
8.42 L/100 km
3.58 gal (US)/100 mi
1206.84 Wh/mi
2012-10-16 294.6 mi
474.11 km
10.384 gal (US)
8.65 gal (Imp)
39.31 L
349.94 kWh
$3.949
($41.01 total for this fill)
28.37 mpg (US)
34.06 mpg (Imp)
8.29 L/100 km
3.52 gal (US)/100 mi
1187.85 Wh/mi
Not much to report for this tank.
Added 5 ml Syntek to this fill-up.

Considering reflashing my ECU again to performance specs to see if it works better with the Syntec.
2012-10-01 345.4 mi
555.87 km
12.014 gal (US)
10 gal (Imp)
45.48 L
404.87 kWh
$3.999
($48.04 total for this fill)
28.75 mpg (US)
34.54 mpg (Imp)
8.18 L/100 km
3.48 gal (US)/100 mi
1172.18 Wh/mi
This tank was a beater tank. I had overdosed it with Syntek and romped on it a little. Not expecting good results.
This fill-up used the appropriate amount of Syntek (5ml for the fill) and I will try to get some decent mileage out of it.
2012-09-08 353.2 mi
568.42 km
11.883 gal (US)
9.89 gal (Imp)
44.98 L
400.46 kWh
$3.879
($46.09 total for this fill)
29.72 mpg (US)
35.71 mpg (Imp)
7.91 L/100 km
3.36 gal (US)/100 mi
1133.81 Wh/mi
This tank had an exact dose of Syntek.
Not really living up to expectations.

Filled and over-dosed the tank with Syntec, using 10 ml for this fill-up.
2012-08-25 341.3 mi
549.27 km
11.55 gal (US)
9.62 gal (Imp)
43.72 L
389.24 kWh
$3.839
($44.34 total for this fill)
29.55 mpg (US)
35.48 mpg (Imp)
7.96 L/100 km
3.38 gal (US)/100 mi
1140.46 Wh/mi
This represents the 1st tank with Syntek's fuel treatment. It also includes DRL (daytime running lights) disable and increased tire pressure (45 psi).
2012-08-11 173.4 mi
279.06 km
5.833 gal (US)
4.86 gal (Imp)
22.08 L
196.57 kWh
$3.699
($21.58 total for this fill)
29.73 mpg (US)
35.68 mpg (Imp)
7.91 L/100 km
3.36 gal (US)/100 mi
1133.62 Wh/mi
This establishes a baseline figure, same as usual mpg. ECU was reset to stock and an oil change was done.
(This fill up included the Syntek, we will see how the first tank fares upon the next fill.)
2012-08-04 375.8 mi
604.79 km
13.696 gal (US)
11.4 gal (Imp)
51.84 L
461.56 kWh
$3.659
($50.11 total for this fill)
27.44 mpg (US)
32.96 mpg (Imp)
8.57 L/100 km
3.64 gal (US)/100 mi
1228.21 Wh/mi
This tank had Lucas Oil fuel treatment. This tank marks the end of my performance map on the Suby's ECU.

This tank to be, will be on the stock map with regular fuel. This tank will serve as my baseline to gauge the fuel treatment I'm buying from Kay.
2012-07-23 356.7 mi
574.05 km
10.496 gal (US)
8.74 gal (Imp)
39.73 L
353.72 kWh
$3.899
($40.92 total for this fill)
33.98 mpg (US)
40.81 mpg (Imp)
6.92 L/100 km
2.94 gal (US)/100 mi
991.65 Wh/mi
Had a nice long cruise to Wolcott, made great mpg on 40 and 50 mph highways.
2012-06-08 322.5 mi
519.01 km
11.036 gal (US)
9.19 gal (Imp)
41.78 L
371.91 kWh
$4.099
($45.24 total for this fill)
29.22 mpg (US)
35.09 mpg (Imp)
8.05 L/100 km
3.42 gal (US)/100 mi
1153.21 Wh/mi
No additives used.
2012-05-15 321.2 mi
516.92 km
11.06 gal (US)
9.21 gal (Imp)
41.87 L
372.72 kWh
$4.199
($46.44 total for this fill)
29.04 mpg (US)
34.88 mpg (Imp)
8.1 L/100 km
3.44 gal (US)/100 mi
1160.4 Wh/mi
No additives added to this tank. Filled with premium, per my fuel map. Weather has been warm and humid.
2012-05-04 303.2 mi
487.95 km
10.739 gal (US)
8.94 gal (Imp)
40.65 L
361.9 kWh
$4.269
($45.84 total for this fill)
28.23 mpg (US)
33.91 mpg (Imp)
8.33 L/100 km
3.54 gal (US)/100 mi
1193.6 Wh/mi
No additives on this tank, switched back to Premium.
2012-04-24 217 mi
349.23 km
7.86 gal (US)
6.54 gal (Imp)
29.75 L
264.88 kWh
$4.369
($34.34 total for this fill)
27.61 mpg (US)
33.18 mpg (Imp)
8.52 L/100 km
3.62 gal (US)/100 mi
1220.65 Wh/mi
.15 of a gallon of this tank was diesel on this fill-up, results to be seen in next tank.
No other additives or enhancements.
2012-04-16 163.3 mi
262.81 km
5.648 gal (US)
4.7 gal (Imp)
21.38 L
190.34 kWh
$4.269
($24.11 total for this fill)
28.91 mpg (US)
34.74 mpg (Imp)
8.14 L/100 km
3.46 gal (US)/100 mi
1165.58 Wh/mi
No additives used. Tried leaving it in gear as long as possible for stops and using 5th gear at 35 mph.
2012-04-07 230.8 mi
371.44 km
9.114 gal (US)
7.59 gal (Imp)
34.5 L
307.14 kWh
$3.999
($36.45 total for this fill)
25.32 mpg (US)
30.41 mpg (Imp)
9.29 L/100 km
3.95 gal (US)/100 mi
1330.76 Wh/mi
Filled with regular, despite my modified fuel map, to see if I can get equivalent mileage on cheaper gas. No additives add this tank.
2012-03-23 282.9 mi
455.28 km
9.275 gal (US)
7.72 gal (Imp)
35.11 L
312.57 kWh
$4.149
($38.48 total for this fill)
30.5 mpg (US)
36.65 mpg (Imp)
7.71 L/100 km
3.28 gal (US)/100 mi
1104.88 Wh/mi
1st tank after oil change, suspension repair, summer tires, etc. Also, uncharacteristically warm weather for VT.
No fuel additives used in this tank.
2012-03-16 192.5 mi
309.8 km
6.904 gal (US)
5.75 gal (Imp)
26.13 L
232.66 kWh
$4.099
($28.3 total for this fill)
27.88 mpg (US)
33.48 mpg (Imp)
8.43 L/100 km
3.59 gal (US)/100 mi
1208.62 Wh/mi
Had an oil change, brake job, and suspension work done.
2012-03-09 296.5 mi
477.17 km
10.931 gal (US)
9.1 gal (Imp)
41.38 L
368.37 kWh
$4.099
($44.81 total for this fill)
27.12 mpg (US)
32.58 mpg (Imp)
8.67 L/100 km
3.69 gal (US)/100 mi
1242.39 Wh/mi
Used a Lucas fuel system cleaner/treatment. I try to use 1 around every oil change.
2012-02-14 174.9 mi
281.47 km
6.803 gal (US)
5.66 gal (Imp)
25.75 L
229.26 kWh
$3.949
($26.87 total for this fill)
25.71 mpg (US)
30.9 mpg (Imp)
9.15 L/100 km
3.89 gal (US)/100 mi
1310.81 Wh/mi
2012-02-03 168.7 mi
271.5 km
6.9 gal (US)
5.75 gal (Imp)
26.12 L
232.53 kWh
$3.899
($26.9 total for this fill)
24.45 mpg (US)
29.34 mpg (Imp)
9.62 L/100 km
4.09 gal (US)/100 mi
1378.36 Wh/mi
93 Octane due to my fuel map.
Cold mornings lately, but oddly warm for VT this year.
2012-01-10 128.7 mi
207.12 km
5.488 gal (US)
4.57 gal (Imp)
20.77 L
184.95 kWh
$3.799
($20.85 total for this fill)
23.45 mpg (US)
28.16 mpg (Imp)
10.03 L/100 km
4.26 gal (US)/100 mi
1437.06 Wh/mi
Lots of cold mornings, tried to use my new block heater but kept forgetting to plug it in.
2011-12-12 240.4 mi
386.89 km
9.374 gal (US)
7.8 gal (Imp)
35.48 L
315.9 kWh
$3.699
($34.67 total for this fill)
25.65 mpg (US)
30.82 mpg (Imp)
9.17 L/100 km
3.9 gal (US)/100 mi
1314.06 Wh/mi
Had a good cold snap, so there are some warm-ups that lowered my usual mpg.
2011-11-23 312.3 mi
502.6 km
11.641 gal (US)
9.69 gal (Imp)
44.07 L
392.3 kWh
$3.699
($43.06 total for this fill)
26.83 mpg (US)
32.23 mpg (Imp)
8.77 L/100 km
3.73 gal (US)/100 mi
1256.16 Wh/mi
Wife borrowed car for this tank. Has snow tires on, 93 octane, and tuned ECU.

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


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