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Fuel log graph
Efficiency log for: The Geo - 1989 Geo Metro
  • Lifetime Fuel Economy: 46.9 mpg (US), 5 L/100 km, 56.4 mpg (Imp)
  • 90-day Fuel Economy: 46.9 mpg (US), 5 L/100 km, 56.4 mpg (Imp)
  • 3-tank Fuel Economy: 47.3 mpg (US), 5 L/100 km, 56.8 mpg (Imp)
  • EPA Combined Rating / % over rating: 46 mpg (US) / 2% (based on 90-day fuel economy)
  • Total fills: 4
  • Average cost per gal/L: $1.71 per gal (US); $0.00 per L (price data entered for 3 fill/s)
  • Average cost per fill: $10.81
  • Average distance cost: $0.04 per mi. / $0.02 per km
  • Total fuel used: 23.67 gal (US), 89.6 L
  • Total distance traveled: 1110.5 mi. / 1787.2 km
  • Total cost: $32.43
  • Total fuel saved vs. EPA: 0.5 gal. (US) / 1.9 L
  • Total saved: $0.86 (based on avg. cost per gal./L)
  • Average tank distance: 277.6 mi. / 446.8 km
Fill date Distance Fill amount Price Fuel Economy Details
2009-01-08 320.3 mi
515.47 km
6.484 gal (US)
5.4 gal (Imp)
24.54 L
218.51 kWh
($12.05 total for this fill)
49.4 mpg (US)
59.31 mpg (Imp)
4.76 L/100 km
2.02 gal (US)/100 mi
682.2 Wh/mi
Filled with 87 octane, definitely not E-10 this time. Will try to get the difference quantified soon, need a baseline first. Average speeds were between 65 and 67 mph. From Brush, Colorado, to Lincoln, Nebraska. CV joint makes lots of noise, may not last the winter... No other mechanical changes. This makes over 1,000 miles on the rebuilt engine, and things are looking pretty good so far!
2009-01-06 223 mi
358.88 km
4.704 gal (US)
3.92 gal (Imp)
17.81 L
158.52 kWh
47.41 mpg (US)
56.89 mpg (Imp)
4.96 L/100 km
2.11 gal (US)/100 mi
710.85 Wh/mi
Using 85 octane, probably still E-10 but here they don't mark them so I am unsure. Speeds averaging 60 mph. The last 160 miles were "downhill", headed from Colorado Springs to Brush. During visit in Colorado I slipped on ice and hit a square curb, denting my rim pretty bad. I had been carrying a full-size spare the whole time, so no real change on wheel size. While changing tire, noticed left CV joint boot is trashed. Rats. Other mechanical status unchanged.
2009-01-03 361 mi
580.97 km
7.921 gal (US)
6.59 gal (Imp)
29.98 L
266.94 kWh
($12.82 total for this fill)
45.58 mpg (US)
54.78 mpg (Imp)
5.16 L/100 km
2.19 gal (US)/100 mi
739.45 Wh/mi
Previous tank was E-10 at 89 octane, this one is 89 as well, probably also E-10 but unmarked. First 100 miles were no-wind, while the remaining were strong cross/head winds. I am removing windshield wiper covers, as I am entering snowy conditions. Headed from Brush, Colorado, to Colorado Springs. All mechanical status remain unchanged.
2009-01-02 206.2 mi
331.85 km
4.556 gal (US)
3.79 gal (Imp)
17.25 L
153.54 kWh
($7.56 total for this fill)
45.26 mpg (US)
54.41 mpg (Imp)
5.2 L/100 km
2.21 gal (US)/100 mi
744.62 Wh/mi
Average speed was 65 mph. Engine idles inconsistently (vroom vroom vroom) and strong fuel smell in exhaust, probably running too rich. The CV joints click when I turn. All seams taped, rear wheel well covers installed (made of cardboard) and windshield wiper cover installed. Main frontal air intake (for radiator) not covered, but all other hood seams taped. First 200 miles on a freshly rebuilt engine.

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