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Fuel log graph
Efficiency log for: Bone's 2010 Prius - 2010 Toyota Prius Black
  • Lifetime Fuel Economy: 59.4 mpg (US), 4 L/100 km, 71.3 mpg (Imp)
  • 90-day Fuel Economy: 56.8 mpg (US), 4.1 L/100 km, 68.2 mpg (Imp)
  • 3-tank Fuel Economy: 50.2 mpg (US), 4.7 L/100 km, 60.3 mpg (Imp)
  • EPA Combined Rating / % over rating: 50 mpg (US) / 13.6% (based on 90-day fuel economy)
  • Total fills: 21
  • Average cost per gal/L: $2.72 per gal (US); $0.00 per L (price data entered for 21 fill/s)
  • Average cost per fill: $22.82
  • Average distance cost: $0.05 per mi. / $0.03 per km
  • Total fuel used: 176.37 gal (US), 667.6 L
  • Total distance traveled: 10472.3 mi. / 16853.5 km
  • Total cost: $479.26
  • Total fuel saved vs. EPA: 33.1 gal. (US) / 125.3 L
  • Total saved: $90.03 (based on avg. cost per gal./L)
  • Average tank distance: 498.7 mi. / 802.5 km
Fill date Distance Fill amount Price Fuel Economy Details
2010-12-05 506.6 mi
815.29 km
9.523 gal (US)
7.93 gal (Imp)
36.05 L
320.93 kWh
$3.39
($32.28 total for this fill)
53.2 mpg (US)
63.88 mpg (Imp)
4.42 L/100 km
1.88 gal (US)/100 mi
633.5 Wh/mi
Tank #21
Tank Dates: 11/22-12/5 (14 days)
Avg. Temp: N/A
440.8 miles (506.6 adjusted to match HSI)

HSI: 53.2
Fill: 46.3
SGII: 49.1

HSI vs. Tank Deviation has settled at around 5% optomistic.

Notes: 75/25 highway/city driving. 75% of tank was trip back from PA to MA. Cruise on...heat on...no hypermiling. Last 25% of tank was normal commute routes to and from work.

---Fill Stats---
Date: 12/05/10
Tank Miles (ODO): 440.8
Gallons Filled: 9.523
2010-11-22 396.1 mi
637.46 km
7.97 gal (US)
6.64 gal (Imp)
30.17 L
268.59 kWh
$3.19
($25.42 total for this fill)
49.7 mpg (US)
59.65 mpg (Imp)
4.73 L/100 km
2.01 gal (US)/100 mi
678.09 Wh/mi
Tank #20
Tank Dates: 11/19-22 (4 days)
Avg. Temp: N/A
373.8 miles (396.1 adjusted to match HSI)

HSI: 49.7
Fill: 46.9
SGII: 45.5

HSI vs. Tank Deviation has settled at around 5% optomistic.

Notes: 75/25 highway/city driving. Motly highway on roadtrip from MA to PA and back to MA. Used cruise the entire trip...heat on in car. No hypermiling.

---Fill Stats---
Date: 11/22/10
Tank Miles (ODO): 373.8
Gallons Filled: 7.970
2010-11-19 440.4 mi
708.76 km
9.272 gal (US)
7.72 gal (Imp)
35.1 L
312.47 kWh
$2.89
($26.8 total for this fill)
47.5 mpg (US)
57.05 mpg (Imp)
4.95 L/100 km
2.11 gal (US)/100 mi
709.51 Wh/mi
Tank #19
Tank Dates: 11/18-19 (2 days)
Avg. Temp: N/A
418.1 miles (440.4 adjusted to match HSI)

HSI: 47.5
Fill: 45.1
SGII: 43.8

HSI vs. Tank Deviation has settled at around 5% optomistic.

Notes: 90/10 highway/city driving. All highway on roadtrip from MA to PA. Used cruise the entire trip...heat on in car. No hypermiling.

---Fill Stats---
Date: 11/19/10
Tank Miles (ODO): 418.1
Gallons Filled: 9.272
2010-11-18 397.7 mi
640.04 km
6.628 gal (US)
5.52 gal (Imp)
25.09 L
223.36 kWh
$2.87
($19.02 total for this fill)
60 mpg (US)
72.05 mpg (Imp)
3.92 L/100 km
1.67 gal (US)/100 mi
561.63 Wh/mi
Tank #18
Tank Dates: 11/3-18 (16 days)
Avg. Temp: 53 degrees
372.1 miles (397.7 adjusted to match HSI)

HSI: 60.0
Fill: 54.3
SGII: 54.3

HSI vs. Tank Deviation has settled at around 4% optomistic.

Notes: 25/75 highway/city driving. Regular commute routes...temps much lower this tank than last (a full 6 degrees on average) but managed to keep mpg at 60. Short tanked here to fill up for trip to PA.

---Fill Stats---
Date: 11/18/10
Tank Miles (ODO): 372.1
Gallons Filled: 6.628
2010-11-03 571.6 mi
919.9 km
9.31 gal (US)
7.75 gal (Imp)
35.24 L
313.75 kWh
$2.78
($25.88 total for this fill)
61.4 mpg (US)
73.75 mpg (Imp)
3.83 L/100 km
1.63 gal (US)/100 mi
548.9 Wh/mi
Tank #17
Tank Dates: 10/18-11/3 (16 days)
Avg. Temp: 59 degrees
533.9 miles (571.6 adjusted to match HSI)

HSI: 61.4
Fill: 57.4
SGII: 57.0

HSI vs. Tank Deviation has settled at around 4% optomistic.

Notes: 25/75 highway/city driving. Regular commute routes...temps continue to get lower but mpg is hanging on for now. No significant precipiation to speak of yet.

---Fill Stats---
Date: 11/03/10
Tank Miles (ODO): 533.9
Gallons Filled: 9.31
2010-10-18 576.3 mi
927.46 km
9.37 gal (US)
7.8 gal (Imp)
35.47 L
315.77 kWh
$2.75
($25.77 total for this fill)
61.5 mpg (US)
73.88 mpg (Imp)
3.82 L/100 km
1.63 gal (US)/100 mi
547.93 Wh/mi
Tank #16
Tank Dates: 9/28-10/18 (21 days)
Avg. Temp: 65 degrees
551.2 miles (576.3 adjusted to match HSI)

HSI: 61.5
Fill: 58.8
SGII: 55.6

HSI vs. Tank Deviation has settled at around 4% optomistic.

Notes: 25/75 highway/city driving. Regular commute routes...temps continue to get lower as does mpg.

---Fill Stats---
Date: 10/18/10
Tank Miles (ODO): 551.2
Gallons Filled: 9.370
2010-09-28 587.9 mi
946.13 km
9.391 gal (US)
7.82 gal (Imp)
35.55 L
316.48 kWh
$2.5
($23.48 total for this fill)
62.6 mpg (US)
75.18 mpg (Imp)
3.76 L/100 km
1.6 gal (US)/100 mi
538.32 Wh/mi
Tank #15
Tank Dates: 9/13-28 (16 days)
Avg. Temp: 73 degrees
551.8 miles (587.9 adjusted to match HSI)

HSI: 62.6
Fill: 58.8
SGII: 59.0

HSI vs. Tank Deviation has settled at around 4% optomistic.

Notes: 20/80 highway/city driving. Regular commute routes...temps have dipped quite a bit over the past few weeks...some rain as well.

---Fill Stats---
Date: 9/28/10
Tank Miles (ODO): 551.8
Gallons Filled: 9.391
2010-09-13 545.3 mi
877.58 km
9.369 gal (US)
7.8 gal (Imp)
35.47 L
315.74 kWh
$2.49
($23.33 total for this fill)
58.2 mpg (US)
69.91 mpg (Imp)
4.04 L/100 km
1.72 gal (US)/100 mi
579.02 Wh/mi
Tank #14
Tank Dates: 9/6-13 (8 days)
Avg. Temp: NA
523.1 miles (545.3 adjusted to match HSI)

HSI: 58.2
Fill: 55.8
SGII: 55.3

HSI vs. Tank Deviation has settled at around 4% optomistic.

Notes: 75/25 highway/city driving. Mostly highway driving on road trip back from PA...final 100 miles of tank was normal work commute driving.

---Fill Stats---
Date: 9/13/10
Tank Miles (ODO): 523.1
Gallons Filled: 9.369
2010-09-06 517.8 mi
833.32 km
8.502 gal (US)
7.08 gal (Imp)
32.18 L
286.52 kWh
$2.59
($22.02 total for this fill)
60.9 mpg (US)
73.14 mpg (Imp)
3.86 L/100 km
1.64 gal (US)/100 mi
553.34 Wh/mi
Tank #13
Tank Dates: 8/27-9/6 (11 days)
Avg. Temp: NA
489.8 miles (517.8 adjusted to match HSI)

HSI: 60.9 mpg
Fill: 57.6 mpg
SGII: 56.2 mpg

Tank Deviation After 10 Tanks has settled at around 4%.

Notes: 75/25 highway/city driving. Mostly highway driving on road trip through PA. Got the mpg over 60 mpg despite heavy highway miles.

---Fill Stats---
Date: 9/06/10
Tank Miles (ODO): 489.8
Gallons Filled: 8.502
2010-08-27 517.4 mi
832.67 km
8.695 gal (US)
7.24 gal (Imp)
32.91 L
293.02 kWh
$2.75
($23.91 total for this fill)
59.51 mpg (US)
71.46 mpg (Imp)
3.95 L/100 km
1.68 gal (US)/100 mi
566.33 Wh/mi
Tank #12
Tank Dates: 8/25-27 (3 days)
Avg. Temp: NA
498.9 miles (517.4 adjusted to match HSI)

HSI: 59.5 mpg
Fill: 57.4 mpg
SGII: 56.7 mpg

Tank Deviation After 10 Tanks has settled at around 4%.

Notes: 80/20 highway/city driving. Mostly highway driving on road trip from MA to PA. Thought I could get it over 60 mpg but fell just short.

---Fill Stats---
Date: 8/27/10
Tank Miles (ODO): 498.9
Gallons Filled: 8.695
2010-08-25 535.6 mi
861.96 km
8.252 gal (US)
6.87 gal (Imp)
31.24 L
278.09 kWh
$2.53
($20.88 total for this fill)
64.91 mpg (US)
77.96 mpg (Imp)
3.62 L/100 km
1.54 gal (US)/100 mi
519.21 Wh/mi
Tank #11
Tank Dates: 8/9-25 (17 days)
Avg. Temp: 78 degrees
512.3 miles (535.6 adjusted to match HSI)

HSI: 64.9 mpg
Fill: 62.1 mpg
SGII: 58.9 mpg

Tank Deviation After 10 Tanks has settled at around 4%.

Notes: 20/80 highway/city driving. Solid tank with mostly city driving to and from work. Temps have settled down so good chance this is my last "warm" tank of the summer.

---Fill Stats---
Date: 8/25/10
Tank Miles (ODO): 512.3
Gallons Filled: 8.252
2010-08-09 598.2 mi
962.71 km
9.391 gal (US)
7.82 gal (Imp)
35.55 L
316.48 kWh
$2.63
($24.7 total for this fill)
63.7 mpg (US)
76.5 mpg (Imp)
3.69 L/100 km
1.57 gal (US)/100 mi
529.05 Wh/mi
Tank #10
Tank Dates: 7/30-8/9 (20 days)
Avg. Temp: 85 degrees
563.7 miles (598.2 adjusted to match HSI)

HSI: 63.7 mpg
Fill: 60.0 mpg
SGII: 60.4 mpg

Inputing only HSI MPG for 10 tanks until deviation of HSI vs. Fill can be accurately tracked. Will adjust for weighted deviation at that time and again after every 10 tanks.

Notes: 50/50 highway/city driving. Lost a chunk of mpg on a long highway trip but not bad for 50/50. Weather was good and have been driving earlier in the morning and later at night so traffic is less.

---Fill Stats---
Date: 8/9/10
Tank Miles (ODO): 563.7
Gallons Filled: 9.391
2010-07-30 608.5 mi
979.29 km
9.138 gal (US)
7.61 gal (Imp)
34.59 L
307.95 kWh
$2.57
($23.48 total for this fill)
66.59 mpg (US)
79.96 mpg (Imp)
3.53 L/100 km
1.5 gal (US)/100 mi
506.08 Wh/mi
Tank #9
Tank Dates: 7/11-30 (20 days)
Avg. Temp: 84 degrees
585.3 miles (608.59 adjusted to match HSI)

HSI: 66.6 mpg
Fill: 64.1 mpg
SGII: 61.3 mpg

Inputing only HSI MPG for 10 tanks until deviation of HSI vs. Fill can be accurately tracked. Will adjust for weighted deviation at that time and again after every 10 tanks.

Notes: Put max effort into seeing what I could get out of the car for mpg...seems to have produced great results. Weather was mostly dry and hot for entire tank. Had one long highway day and did pretty well with mpg logging 60+ mpg over 100+ miles. 66.6 mpg is highest I have posted since owning a Prius (2009 and 2010 models).

---Fill Stats---
Date: 7/30/10
Tank Miles (ODO): 585.3
Gallons Filled: 9.138
2010-07-11 519.5 mi
836.05 km
9.05 gal (US)
7.54 gal (Imp)
34.26 L
304.99 kWh
$2.53
($22.9 total for this fill)
57.4 mpg (US)
68.9 mpg (Imp)
4.1 L/100 km
1.74 gal (US)/100 mi
587.08 Wh/mi
Tank #8
Tank Dates: 7/5-11 (7 days)
Avg. Temp: N/A degrees
488.4 miles (519.47 adjusted to match HSI)

HSI: 57.4 mpg
Fill: 54.0 mpg
SGII: 52.7 mpg

Inputing only HSI MPG for 10 tanks until deviation of HSI vs. Fill can be accurately tracked. Will adjust for weighted deviation at that time and again after every 10 tanks.

Notes: First 325 miles of this tank was all highway from PA to MA...very little hypermiling. A/C on and cruise control on. Had a passenger in car that didn't want to sweat and wanted to get to the destination quickly! Somewhat saved tank with final 150+ miles of hypermiling.

---Fill Stats---
Date: 7/11/10
Tank Miles (ODO): 488.4
Gallons Filled: 9.050
2010-07-05 378.3 mi
608.81 km
7.006 gal (US)
5.83 gal (Imp)
26.52 L
236.1 kWh
$2.65
($18.57 total for this fill)
54 mpg (US)
64.89 mpg (Imp)
4.36 L/100 km
1.85 gal (US)/100 mi
624.11 Wh/mi
Tank #7
Tank Dates: 7/1-5 (5 days)
Avg. Temp: N/A degrees
366.2 miles (378.3 adjusted to match HSI)

HSI: 54.0 mpg
Fill: 52.3 mpg
SGII: 51.9 mpg

Inputing only HSI MPG for 10 tanks until deviation of HSI vs. Fill can be accurately tracked. Will adjust for weighted deviation at that time and again after every 10 tanks.

Notes: All highway...very little hypermiling. A/C on and cruise control on. Had a passenger in car that didn't want to sweat and wanted to get to the destination quickly!

---Fill Stats---
Date: 7/5/10
Tank Miles (ODO): 366.2
Gallons Filled: 7.006
2010-07-01 444.9 mi
716 km
7.916 gal (US)
6.59 gal (Imp)
29.97 L
266.77 kWh
$2.69
($21.29 total for this fill)
56.2 mpg (US)
67.51 mpg (Imp)
4.19 L/100 km
1.78 gal (US)/100 mi
599.62 Wh/mi
Tank #6
Tank Dates: 6/30-7/1 (2 days)
Avg. Temp: N/A degrees
427.5 miles (444.9 adjusted to match HSI)

HSI: 56.2 mpg
Fill: 54.0 mpg
SGII: 54.7 mpg

Inputing only HSI MPG for 10 tanks until deviation of HSI vs. Fill can be accurately tracked. Will adjust for weighted deviation at that time and again after every 10 tanks.

Notes: All highway...very little hypermiling. A/C on and cruise control on. Had a passenger in car that didn't want to sweat and wanted to get to the destination quickly!

---Fill Stats---
Date: 7/1/10
Tank Miles (ODO): 427.5
Gallons Filled: 7.916
2010-06-30 392.4 mi
631.51 km
6.249 gal (US)
5.2 gal (Imp)
23.66 L
210.59 kWh
$2.61
($16.31 total for this fill)
62.79 mpg (US)
75.46 mpg (Imp)
3.75 L/100 km
1.59 gal (US)/100 mi
536.67 Wh/mi
Tank #5
Tank Dates: 6/23-30 (8 days)
Avg. Temp: 83 degrees
376.4 miles (392.4 adjusted to match HSI)

HSI: 62.8 mpg
Fill: 60.2 mpg
SGII: 57.1 mpg

Inputing only HSI MPG for 10 tanks until deviation of HSI vs. Fill can be accurately tracked. Will adjust for weighted deviation at that time and again after every 10 tanks.

Notes: Short tanked for road trip. This tank was 50/50 city/highway. Pretty good results for being 50/50.

---Fill Stats---
Date: 6/30/10
Tank Miles (ODO): 376.4
Gallons Filled: 6.249
2010-06-23 506.9 mi
815.78 km
7.822 gal (US)
6.51 gal (Imp)
29.61 L
263.6 kWh
$2.59
($20.26 total for this fill)
64.8 mpg (US)
77.86 mpg (Imp)
3.63 L/100 km
1.54 gal (US)/100 mi
520.02 Wh/mi
Tank #4
Tank Dates: 6/10-23 (14 days)
Avg. Temp: 76 degrees
495.1 miles (506.9 adjusted to match HSI)

HSI: 64.8 mpg
Fill: 63.3 mpg
SGII: 52.8 mpg

Inputing only HSI MPG for 10 tanks until deviation of HSI vs. Fill can be accurately tracked. Will adjust for weighted deviation at that time and again after every 10 tanks.

Notes: Getting hang of driving both city and highway with improved results. Seeing routine 80 mpg commutes to work over 11 miles (65 mpg on return trip due to low to high elevation along route). Weather on this tank was tremendous...still trying to post 66+ mpg tanks...work in progress.

---Fill Stats---
Date: 6/23/10
Tank Miles (ODO): 495.1
Gallons Filled: 7.822
2010-06-10 577.5 mi
929.4 km
9.609 gal (US)
8 gal (Imp)
36.37 L
323.82 kWh
$2.67
($25.66 total for this fill)
60.1 mpg (US)
72.19 mpg (Imp)
3.91 L/100 km
1.66 gal (US)/100 mi
560.73 Wh/mi
Tank #3
Tank Dates: 6/6-10 (5 days)
Avg. Temp: 72 degrees
489.3 miles (577.5 adjusted to match HSI)

HSI: 60.1 mpg
Fill: 50.9 mpg
SGII: 61.5 mpg

Inputing only HSI MPG for 10 tanks until deviation of HSI vs. Fill can be accurately tracked. Will adjust for weighted deviation at that time and again after every 10 tanks.

Notes: Mostly highway from PA to MA (last 100 miles of tank was city driving...rest was highway). Mixed use of hypermiling and cruise control during highway driving. Obvious tank fill error...off by way too much...hopefully will correct itself on next tank. Used A/C for some of the driving...does not show up in mpg but shows up in fill...could be reason for tank error.

---Fill Stats---
Date: 6/10/10
Tank Miles (ODO): 489.3
Gallons Filled: 9.609
2010-06-06 456 mi
733.86 km
7.862 gal (US)
6.55 gal (Imp)
29.76 L
264.95 kWh
$2.69
($21.15 total for this fill)
58 mpg (US)
69.62 mpg (Imp)
4.06 L/100 km
1.72 gal (US)/100 mi
581.03 Wh/mi
Tank #2
Tank Dates: 6/3-6/6 (4 days)
Avg. Temp: 80 degrees
497.6 miles (456.0 adjusted to match HSI)

HSI: 58.0 mpg
Fill: 63.3 mpg
SGII: 59.0 mpg

Inputing only HSI MPG for 10 tanks until deviation of HSI vs. Fill can be accurately tracked. Will adjust for weighted deviation at that time and again after every 10 tanks.

Notes: All highway from MA to PA. Mixed use of hypermiling and cruise control (mainly to see effects of both on mpg as I learn the new car). Possible tank error on fill mpg as usually calc'd mpg will be lower than HSI mpg...should correct itself upon next fill.

---Fill Stats---
Date: 6/6/10
Tank Miles (ODO): 497.6
Gallons Filled: 7.862
2010-06-03 397.4 mi
639.55 km
6.048 gal (US)
5.04 gal (Imp)
22.89 L
203.82 kWh
$2.67
($16.15 total for this fill)
65.71 mpg (US)
78.85 mpg (Imp)
3.58 L/100 km
1.52 gal (US)/100 mi
512.88 Wh/mi
Tank #1
Tank Dates: 5/22-6/3 (13 days)
Avg. Temp: 78 degrees
389.0 miles (397.35 adjusted to match HSI)

HSI: 65.7 mpg
Fill: 64.3 mpg
SGII: 66.7 mpg

Inputing only HSI MPG for 10 tanks until deviation of HSI vs. Fill can be accurately tracked. Will adjust for weighted deviation at that time and again after every 10 tanks.

Notes: Tires at 50 psi (44 psi rated tires). Working off dealer filled tank so may take another tank or two to get accurate fill & SGII figures. This tank was mostly city driving. Getting used to new car and various driving techniques that work in it compared to my 2009 Prius. Overall, it looks like higher mpg is possible from stock vehicle.

---Fill Stats---
Date: 6/3/10
Tank Miles (ODO): 389.0
Gallons Filled: 6.048

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


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