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Fuel log graph
Efficiency log for: Mom's Prius (my driving) - 2008 Toyota Prius Base w/ Package 5
  • Lifetime Fuel Economy: 49.3 mpg (US), 4.8 L/100 km, 59.3 mpg (Imp)
  • 90-day Fuel Economy: 50.7 mpg (US), 4.6 L/100 km, 60.9 mpg (Imp)
  • 3-tank Fuel Economy: 50.3 mpg (US), 4.7 L/100 km, 60.4 mpg (Imp)
  • EPA Combined Rating / % over rating: 46 mpg (US) / 10.2% (based on 90-day fuel economy)
  • Total fills: 4
  • Average cost per gal/L: $2.17 per gal (US); $0.00 per L (price data entered for 4 fill/s)
  • Average cost per fill: $5.93
  • Average distance cost: $0.04 per mi. / $0.03 per km
  • Total fuel used: 10.94 gal (US), 41.4 L
  • Total distance traveled: 539.8 mi. / 868.7 km
  • Total cost: $23.71
  • Total fuel saved vs. EPA: 0.8 gal. (US) / 3 L
  • Total saved: $1.74 (based on avg. cost per gal./L)
  • Average tank distance: 135 mi. / 217.2 km
Fill date Distance Fill amount Price Fuel Economy Details
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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