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Fuel log graph
Efficiency log for: Mom's Prius (my driving) - 2008 Toyota Prius
  • Lifetime Fuel Economy: 52.2 mpg (US), 4.5 L/100 km, 62.7 mpg (Imp)
  • 90-day Fuel Economy: 54.7 mpg (US), 4.3 L/100 km, 65.7 mpg (Imp)
  • 3-tank Fuel Economy: 61 mpg (US), 3.9 L/100 km, 73.2 mpg (Imp)
  • EPA Combined Rating / % over rating: 46 mpg (US) / 19% (based on 90-day fuel economy)
  • Total fills: 17
  • Average cost per gal/L: $2.48 per gal (US); $0.00 per L (price data entered for 17 fill/s)
  • Average cost per fill: $3.36
  • Average distance cost: $0.05 per mi. / $0.03 per km
  • Total fuel used: 23.05 gal (US), 87.3 L
  • Total distance traveled: 1203.9 mi. / 1937.5 km
  • Total cost: $57.10
  • Total fuel saved vs. EPA: 3.1 gal. (US) / 11.7 L
  • Total saved: $7.69 (based on avg. cost per gal./L)
  • Average tank distance: 70.8 mi. / 114 km
Fill date Distance Fill amount Price Fuel Economy Details
2019-08-15 44 mi
70.81 km
0.6773 gal (US)
0.56 gal (Imp)
2.56 L
22.83 kWh
$2.549
($1.73 total for this fill)
64.96 mpg (US)
78.57 mpg (Imp)
3.62 L/100 km
1.54 gal (US)/100 mi
518.86 Wh/mi
23 miles to the Smiths (got lost): 61.6 mpg
21 miles back home: 69.1 mpg (record trip)
2019-08-14 21 mi
33.8 km
0.3075 gal (US)
0.26 gal (Imp)
1.16 L
10.36 kWh
$2.549
($0.78 total for this fill)
68.29 mpg (US)
80.77 mpg (Imp)
3.43 L/100 km
1.46 gal (US)/100 mi
493.33 Wh/mi
Driving home from the Smiths. Dr. Prius instrumentation active for the whole drive. Battery SOC started and ended at 62.0%.
2019-08-02 66 mi
106.22 km
1.1641 gal (US)
0.97 gal (Imp)
4.41 L
39.23 kWh
$2.699
($3.14 total for this fill)
56.7 mpg (US)
68.04 mpg (Imp)
4.15 L/100 km
1.76 gal (US)/100 mi
594.39 Wh/mi
6.5 miles to work.
Pizza delivery driving. Still with that big ugly bad aero sign.
6.5 miles back home.
2019-06-27 46 mi
74.03 km
0.8334 gal (US)
0.69 gal (Imp)
3.15 L
28.09 kWh
$2.549
($2.12 total for this fill)
55.2 mpg (US)
66.67 mpg (Imp)
4.26 L/100 km
1.81 gal (US)/100 mi
610.65 Wh/mi
6.5 miles to work.
Pizza delivery driving. Still with that big ugly bad aero sign.
6.5 miles back home.
2019-06-26 11.4 mi
18.35 km
0.1796 gal (US)
0.15 gal (Imp)
0.68 L
6.05 kWh
$2.549
($0.46 total for this fill)
63.47 mpg (US)
76 mpg (Imp)
3.71 L/100 km
1.58 gal (US)/100 mi
530.7 Wh/mi
Cruise at 45, coast in D to stops, DWL on the two hills.

59.5 MPG into town, 68.1 MPG back home (record trip).
2019-06-23 51 mi
82.08 km
0.9173 gal (US)
0.76 gal (Imp)
3.47 L
30.91 kWh
$2.549
($2.34 total for this fill)
55.6 mpg (US)
67.11 mpg (Imp)
4.23 L/100 km
1.8 gal (US)/100 mi
606.08 Wh/mi
6.5 miles to work.
Pizza delivery driving. Still with that big ugly bad aero sign.
6.5 miles back home.
2019-06-18 11.4 mi
18.35 km
0.1897 gal (US)
0.16 gal (Imp)
0.72 L
6.39 kWh
$2.549
($0.48 total for this fill)
60.09 mpg (US)
71.25 mpg (Imp)
3.92 L/100 km
1.66 gal (US)/100 mi
560.53 Wh/mi
Cruise at 45, coast in D to stops, DWL on the two hills.

54.4 MPG into town, 67.1 MPG back home (record trip).
2019-06-05 49 mi
78.86 km
0.9177 gal (US)
0.76 gal (Imp)
3.47 L
30.93 kWh
$2.849
($2.61 total for this fill)
53.39 mpg (US)
64.47 mpg (Imp)
4.4 L/100 km
1.87 gal (US)/100 mi
631.22 Wh/mi
To town W for parts for the Insight's catalytic converter.
To home.
To town H for tire patching.
To home.
To work.
Pizza delivery.
To home.
2019-06-03 80 mi
128.75 km
1.5595 gal (US)
1.3 gal (Imp)
5.9 L
52.56 kWh
$2.849
($4.44 total for this fill)
51.3 mpg (US)
61.54 mpg (Imp)
4.58 L/100 km
1.95 gal (US)/100 mi
657 Wh/mi
6.5 miles to work.
Pizza delivery driving. Still with that big ugly bad aero sign.
6.5 miles back home.
2019-06-02 53 mi
85.3 km
0.969 gal (US)
0.81 gal (Imp)
3.67 L
32.66 kWh
$2.849
($2.76 total for this fill)
54.7 mpg (US)
65.43 mpg (Imp)
4.3 L/100 km
1.83 gal (US)/100 mi
616.23 Wh/mi
4.5 miles to gas station.
~10 miles to work
Pizza delivery.
6.5 miles back home.
2019-06-01 204 mi
328.31 km
3.9347 gal (US)
3.28 gal (Imp)
14.89 L
132.6 kWh
$2.849
($11.21 total for this fill)
51.85 mpg (US)
62.2 mpg (Imp)
4.54 L/100 km
1.93 gal (US)/100 mi
650 Wh/mi
66.1 MPG over 14 miles to work from the S's.
49.9 MPG over 156 miles doing pizza delivery.
58.3 MPG over 14 miles back to S's after work.
56.1 MPG over 20 miles home from the S's w/ no hypermiling.
2019-05-31 10.9 mi
17.54 km
0.1867 gal (US)
0.16 gal (Imp)
0.71 L
6.29 kWh
$2.849
($0.53 total for this fill)
58.38 mpg (US)
68.13 mpg (Imp)
4.05 L/100 km
1.71 gal (US)/100 mi
577.06 Wh/mi
Trip into town, cold engine, 53.4 MPG. Trip back home, warm engine, 64.4 MPG.

45 MPH cruise control, DWL on the 2 hills, and coasting to stops with regenning.
2019-05-22 16.4 mi
26.39 km
0.2772 gal (US)
0.23 gal (Imp)
1.05 L
9.34 kWh
$2.849
($0.79 total for this fill)
59.16 mpg (US)
71.3 mpg (Imp)
3.98 L/100 km
1.69 gal (US)/100 mi
569.51 Wh/mi
8.2 miles, semi-warm engine. Half was good hypermiling, other half was very hilly. 100% city, 57.8 MPG.

8.2 mile return trip, mostly warm engine, same route, 60.6 MPG.
2019-05-15 11.4 mi
18.35 km
0.2249 gal (US)
0.19 gal (Imp)
0.85 L
7.58 kWh
$2.849
($0.64 total for this fill)
50.69 mpg (US)
60 mpg (Imp)
4.63 L/100 km
1.97 gal (US)/100 mi
664.91 Wh/mi
I obviously don't drive the Prius much.

Cold engine, short trip, 5.7 miles each way, 100% city. No hypermiling other than not racing to stops.
2019-01-09 57.7 mi
92.86 km
1.1953 gal (US)
0.99 gal (Imp)
4.52 L
40.28 kWh
$1.999
($2.39 total for this fill)
48.27 mpg (US)
58.28 mpg (Imp)
4.87 L/100 km
2.07 gal (US)/100 mi
698.09 Wh/mi
Not really any aggressive hypermiling. Fuel economy in the Prius seems to be almost the same regardless of driving style. Engine temperature and battery charge level have the largest impact on fuel economy.

This contained a 43 MPG trip into town on a cold engine, and the return trip was 54 MPG just because the engine was warmed up. Both trips were ~25 miles.
2018-12-19 40 mi
64.37 km
0.7491 gal (US)
0.62 gal (Imp)
2.84 L
25.24 kWh
$2.199
($1.65 total for this fill)
53.4 mpg (US)
64.52 mpg (Imp)
4.41 L/100 km
1.87 gal (US)/100 mi
631 Wh/mi
Just over 50% city driving. Drafting behind semi truck half the time on the highway. Maximizing EV & regen potential.
2018-12-12 430.7 mi
693.14 km
8.7719 gal (US)
7.31 gal (Imp)
33.21 L
295.61 kWh
$2.169
($19.03 total for this fill)
49.1 mpg (US)
58.92 mpg (Imp)
4.79 L/100 km
2.04 gal (US)/100 mi
686.35 Wh/mi
Highway trip travelling from college in Virginia. About a third of it was through the mountains.

- New Michelin winter tires
- Lots of wind for first half of the trip
- First time driving a Prius.

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


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