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Fuel log graph
Efficiency log for: Mom's Car - 2001 Chevrolet Impala Base
  • Lifetime Fuel Economy: 21 mpg (US), 11.2 L/100 km, 25.2 mpg (Imp)
  • 90-day Fuel Economy: 20.5 mpg (US), 11.5 L/100 km, 24.6 mpg (Imp)
  • 3-tank Fuel Economy: 19.3 mpg (US), 12.2 L/100 km, 23.1 mpg (Imp)
  • EPA Combined Rating / % over rating: 22 mpg (US) / -6.9% (based on 90-day fuel economy)
  • Total fills: 14
  • Average cost per gal/L: $2.83 per gal (US); $0.00 per L (price data entered for 14 fill/s)
  • Average cost per fill: $34.45
  • Average distance cost: $0.13 per mi. / $0.08 per km
  • Total fuel used: 170.48 gal (US), 645.3 L
  • Total distance traveled: 3579.7 mi. / 5761 km
  • Total cost: $482.28
  • Total fuel saved vs. EPA: -7.8 gal. (US) / -29.5 L
  • Total saved: $-22.07 (based on avg. cost per gal./L)
  • Average tank distance: 255.7 mi. / 411.5 km
Fill date Distance Fill amount Price Fuel Economy Details
2021-06-20 293 mi
471.54 km
13.967 gal (US)
11.63 gal (Imp)
52.87 L
470.69 kWh
$3.259
($45.52 total for this fill)
20.98 mpg (US)
25.19 mpg (Imp)
11.21 L/100 km
4.77 gal (US)/100 mi
1606.45 Wh/mi
56,310 Mi.

12 oz Yellow HEET Added.
2021-05-11 270.1 mi
434.68 km
13.533 gal (US)
11.27 gal (Imp)
51.23 L
456.06 kWh
$3.049
($41.26 total for this fill)
19.96 mpg (US)
23.97 mpg (Imp)
11.79 L/100 km
5.01 gal (US)/100 mi
1688.49 Wh/mi
56,017 Miles.

40 PSI Hot.

12 oz Yellow Heet added at the end.
2021-02-01 212.3 mi
341.66 km
12.752 gal (US)
10.62 gal (Imp)
48.27 L
429.74 kWh
$2.749
($35.06 total for this fill)
16.65 mpg (US)
19.99 mpg (Imp)
14.13 L/100 km
6.01 gal (US)/100 mi
2024.21 Wh/mi
Added 12 oz Yellow HEET.
2020-10-25 289.9 mi
466.55 km
12.626 gal (US)
10.51 gal (Imp)
47.79 L
425.5 kWh
$2.499
($31.55 total for this fill)
22.96 mpg (US)
27.58 mpg (Imp)
10.24 L/100 km
4.36 gal (US)/100 mi
1467.75 Wh/mi
Not an accurate tank reading. Put 1 bottle of HEET (Yellow) in this previous tank and 2 oz Opti-Lube XL. Also added 12 oz Amsoil Performance Improver this tank, since it's just over 55k miles (55,044.)

I replaced the fuel filter relatively recently.
2020-08-22 213.3 mi
343.27 km
10.304 gal (US)
8.58 gal (Imp)
39 L
347.24 kWh
$2.499
($25.75 total for this fill)
20.7 mpg (US)
24.86 mpg (Imp)
11.36 L/100 km
4.83 gal (US)/100 mi
1627.94 Wh/mi
Sheetz Pump 8. 87 E10.

Also added 2 ounces of Opti-Lube XL (Diesel Additive) to the tank, plus 12 oz HEET (Yellow Bottle.)

Tires re-checked, and I removed about 2 PSI from each tire, making them 45 PSI Hot.
2020-06-30 275.2 mi
442.89 km
12.916 gal (US)
10.75 gal (Imp)
48.89 L
435.27 kWh
$2.459
($31.76 total for this fill)
21.31 mpg (US)
25.6 mpg (Imp)
11.04 L/100 km
4.69 gal (US)/100 mi
1581.65 Wh/mi
2020-02-06 224.8 mi
361.78 km
8.53 gal (US)
7.1 gal (Imp)
32.29 L
287.46 kWh
$2.759
($23.53 total for this fill)
26.35 mpg (US)
31.66 mpg (Imp)
8.93 L/100 km
3.79 gal (US)/100 mi
1278.74 Wh/mi
This tank was a trip to Pittsburgh for the Dentist.
2020-02-02 217.3 mi
349.71 km
10.717 gal (US)
8.92 gal (Imp)
40.57 L
361.16 kWh
$2.759
($29.57 total for this fill)
20.28 mpg (US)
24.36 mpg (Imp)
11.6 L/100 km
4.93 gal (US)/100 mi
1662.03 Wh/mi
2019-11-28 232 mi
373.37 km
11.588 gal (US)
9.65 gal (Imp)
43.87 L
390.52 kWh
$2.959
($34.29 total for this fill)
20.02 mpg (US)
24.04 mpg (Imp)
11.75 L/100 km
4.99 gal (US)/100 mi
1683.28 Wh/mi
First tank logged with Amsoil 0w30, Amsoil Signature Series ATF and Engine Off Coasting (mostly local driving.)
2019-02-14 222.8 mi
358.56 km
12.884 gal (US)
10.73 gal (Imp)
48.77 L
434.19 kWh
$2.649
($34.13 total for this fill)
17.29 mpg (US)
20.76 mpg (Imp)
13.6 L/100 km
5.78 gal (US)/100 mi
1948.79 Wh/mi
2018-07-02 328.7 mi
528.99 km
14.086 gal (US)
11.73 gal (Imp)
53.32 L
474.7 kWh
$3
($42.26 total for this fill)
23.34 mpg (US)
28.02 mpg (Imp)
10.08 L/100 km
4.29 gal (US)/100 mi
1444.17 Wh/mi
Skipped some tanks.
2018-06-06 257.3 mi
414.08 km
12.4 gal (US)
10.33 gal (Imp)
46.94 L
417.88 kWh
$3.109
($38.55 total for this fill)
20.75 mpg (US)
24.91 mpg (Imp)
11.34 L/100 km
4.82 gal (US)/100 mi
1624.1 Wh/mi
Skipped one tank recording.

Rough estimate of fuel used (counting a small partial fill.) Added RLI Additive.
2018-04-16 284.2 mi
457.38 km
13.862 gal (US)
11.54 gal (Imp)
52.47 L
467.15 kWh
$2.929
($40.6 total for this fill)
20.5 mpg (US)
24.63 mpg (Imp)
11.47 L/100 km
4.88 gal (US)/100 mi
1643.74 Wh/mi
GETGO Brookville Pump 1. Added 2 oz RLI Additive at end.
2018-03-24 258.8 mi
416.5 km
10.31 gal (US)
8.59 gal (Imp)
39.03 L
347.45 kWh
$2.759
($28.45 total for this fill)
25.1 mpg (US)
30.13 mpg (Imp)
9.37 L/100 km
3.98 gal (US)/100 mi
1342.54 Wh/mi
Filled at Brookville, PA Sheetz Pump 7. Added 1 oz RLI additive before pumping. Had Amsoil Performance Improver in the previous tank; the injectors are clean.

Most driving was "HWY." Engine off coasted for an estimated 15-30 miles this tank.

Aired up tires to 44 Hot in the latter half of the tank (they were a few pounds low.)

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


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