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Fuel log graph
Efficiency log for: Eggy - 1999 Saturn SL2
  • Lifetime Fuel Economy: 43.7 mpg (US), 5.4 L/100 km, 52.5 mpg (Imp)
  • 90-day Fuel Economy: 43.7 mpg (US), 5.4 L/100 km, 52.5 mpg (Imp)
  • 3-tank Fuel Economy: 40.8 mpg (US), 5.8 L/100 km, 49 mpg (Imp)
  • EPA Combined Rating / % over rating: 27 mpg (US) / 61.9% (based on 90-day fuel economy)
  • Total fills: 15
  • Average cost per gal/L: $2.72 per gal (US); $0.00 per L (price data entered for 15 fill/s)
  • Average cost per fill: $19.02
  • Average distance cost: $0.06 per mi. / $0.04 per km
  • Total fuel used: 104.73 gal (US), 396.4 L
  • Total distance traveled: 4576.2 mi. / 7364.7 km
  • Total cost: $285.33
  • Total fuel saved vs. EPA: 64.8 gal. (US) / 245.3 L
  • Total saved: $176.26 (based on avg. cost per gal./L)
  • Average tank distance: 305.1 mi. / 491 km
Fill date Distance Fill amount Price Fuel Economy Details
2010-08-26 306.3 mi
492.94 km
7.656 gal (US)
6.37 gal (Imp)
28.98 L
258.01 kWh
$2.48
($18.99 total for this fill)
40.01 mpg (US)
48.08 mpg (Imp)
5.88 L/100 km
2.5 gal (US)/100 mi
842.34 Wh/mi
70 mph, all highway. Found a cheaper gas station
2010-08-24 391.6 mi
630.22 km
9.111 gal (US)
7.59 gal (Imp)
34.49 L
307.04 kWh
$2.6
($23.69 total for this fill)
42.98 mpg (US)
51.59 mpg (Imp)
5.47 L/100 km
2.33 gal (US)/100 mi
784.07 Wh/mi
70mph, all highway
2010-08-23 277.1 mi
445.95 km
7.112 gal (US)
5.92 gal (Imp)
26.92 L
239.67 kWh
$2.6
($18.49 total for this fill)
38.96 mpg (US)
46.81 mpg (Imp)
6.04 L/100 km
2.57 gal (US)/100 mi
864.92 Wh/mi
70mph average, all highway
2010-08-20 378 mi
608.33 km
9.473 gal (US)
7.89 gal (Imp)
35.86 L
319.24 kWh
$2.65
($25.1 total for this fill)
39.9 mpg (US)
47.91 mpg (Imp)
5.89 L/100 km
2.51 gal (US)/100 mi
844.55 Wh/mi
Half highway, half city
2010-08-11 401 mi
645.35 km
9.437 gal (US)
7.86 gal (Imp)
35.72 L
318.03 kWh
$2.86
($26.99 total for this fill)
42.49 mpg (US)
51.02 mpg (Imp)
5.53 L/100 km
2.35 gal (US)/100 mi
793.09 Wh/mi
May have gas pump error. Tried to maintain 70mph to determine mpg at that level.
2010-08-09 189.2 mi
304.49 km
4.002 gal (US)
3.33 gal (Imp)
15.15 L
134.87 kWh
$2.66
($10.65 total for this fill)
47.28 mpg (US)
56.82 mpg (Imp)
4.98 L/100 km
2.12 gal (US)/100 mi
712.84 Wh/mi
Using new gas station that tends to pump gas "faster". Testing 70mph cruising speeds again. On the way home, some rain and turned on the lights.
2010-08-05 200 mi
321.87 km
4.402 gal (US)
3.66 gal (Imp)
16.66 L
148.35 kWh
$2.86
($12.59 total for this fill)
45.43 mpg (US)
54.64 mpg (Imp)
5.18 L/100 km
2.2 gal (US)/100 mi
741.75 Wh/mi
2010-08-04 200 mi
321.87 km
4.314 gal (US)
3.59 gal (Imp)
16.33 L
145.38 kWh
$2.86
($12.34 total for this fill)
46.36 mpg (US)
55.71 mpg (Imp)
5.07 L/100 km
2.16 gal (US)/100 mi
726.9 Wh/mi
Drove at 60 mph. Took off mud flaps / air diverters on the two front wheels. Looks like I will have to put them back on.
2010-08-03 199 mi
320.26 km
4.2 gal (US)
3.5 gal (Imp)
15.9 L
141.54 kWh
$2.86
($12.01 total for this fill)
47.38 mpg (US)
56.86 mpg (Imp)
4.96 L/100 km
2.11 gal (US)/100 mi
711.26 Wh/mi
Single day commute at 60 mph to re-establish baseline mpg with the car and current mods.
2010-08-02 206 mi
331.52 km
4.547 gal (US)
3.79 gal (Imp)
17.21 L
153.23 kWh
$2.78
($12.64 total for this fill)
45.3 mpg (US)
54.35 mpg (Imp)
5.19 L/100 km
2.21 gal (US)/100 mi
743.83 Wh/mi
Half miles at 60 mph, other half at 70 mph. In a rush for a meeting so drove faster.
2010-07-29 401 mi
645.35 km
8.702 gal (US)
7.25 gal (Imp)
32.94 L
293.26 kWh
$2.74
($23.84 total for this fill)
46.08 mpg (US)
55.31 mpg (Imp)
5.1 L/100 km
2.17 gal (US)/100 mi
731.32 Wh/mi
Not very happy with the HAI, but at least I can go back to the stock setup and call it quits on the HAI. It seems to be decreasing the overall vacuum pressure and skewing the scanguages mpg calculation. I seen 51 - 52 mpg for the entire tank per the scanguage but it appears that I really only got around 46 mpg on this tank.

Also, I pumped at Sams Club instead of my usual Meijer gas station. The pump was pumping gas much faster than I normally pumped so that may have caused some error.
2010-07-27 400 mi
643.74 km
8.227 gal (US)
6.85 gal (Imp)
31.14 L
277.25 kWh
$2.79
($22.95 total for this fill)
48.62 mpg (US)
58.39 mpg (Imp)
4.84 L/100 km
2.06 gal (US)/100 mi
693.13 Wh/mi
99% highway at 60 mph. The front air diverters for the two front tires appear to be working well.

Method of driving was to slow to 55 mph while go uphill and accelerate back to 60 mph go down hill.
2010-07-26 219 mi
352.45 km
4.925 gal (US)
4.1 gal (Imp)
18.64 L
165.97 kWh
$2.82
($13.89 total for this fill)
44.47 mpg (US)
53.41 mpg (Imp)
5.29 L/100 km
2.25 gal (US)/100 mi
757.85 Wh/mi
90% highway, 10% city. Mostly at 60 mph.

Installed two flaps in front of two front wheels to minimize air from going into wheel well from the air passing below the belly pan.
2010-07-15 402 mi
646.96 km
9.016 gal (US)
7.51 gal (Imp)
34.13 L
303.84 kWh
$2.8
($25.24 total for this fill)
44.59 mpg (US)
53.53 mpg (Imp)
5.28 L/100 km
2.24 gal (US)/100 mi
755.82 Wh/mi
Experimented with 60 - 65 mph cruising speed. 99.9% highway miles.
2010-07-13 406 mi
653.39 km
9.601 gal (US)
7.99 gal (Imp)
36.34 L
323.55 kWh
$2.7
($25.92 total for this fill)
42.29 mpg (US)
50.81 mpg (Imp)
5.56 L/100 km
2.36 gal (US)/100 mi
796.92 Wh/mi
Cruising 65 - 75mph. 99% highway miles.

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


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