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Fuel log graph
Efficiency log for: Wilford Brimley - 2002 Mazda Protege5
  • Lifetime Fuel Economy: 29.2 mpg (US), 8 L/100 km, 35.1 mpg (Imp)
  • 90-day Fuel Economy: 33.8 mpg (US), 7 L/100 km, 40.6 mpg (Imp)
  • 3-tank Fuel Economy: 29.3 mpg (US), 8 L/100 km, 35.2 mpg (Imp)
  • EPA Combined Rating / % over rating: 24 mpg (US) / 40.8% (based on 90-day fuel economy)
  • Total fills: 12
  • Average cost per gal/L: $3.65 per gal (US); $0.00 per L (price data entered for 5 fill/s)
  • Average cost per fill: $43.50
  • Average distance cost: $0.13 per mi. / $0.08 per km
  • Total fuel used: 138.4 gal (US), 523.9 L
  • Total distance traveled: 4046.8 mi. / 6512.7 km
  • Total cost: $217.48
  • Total fuel saved vs. EPA: 30.2 gal. (US) / 114.3 L
  • Total saved: $110.23 (based on avg. cost per gal./L)
  • Average tank distance: 337.2 mi. / 542.7 km
Fill date Distance Fill amount Price Fuel Economy Details
2013-05-07 251 mi
403.95 km
7.43 gal (US)
6.19 gal (Imp)
28.13 L
250.39 kWh
33.78 mpg (US)
40.55 mpg (Imp)
6.96 L/100 km
2.96 gal (US)/100 mi
997.57 Wh/mi
Isn't reflective of my recent tanks. In entirely city driving, I'll see 25.5 MPG at worst.
2012-12-08 326.8 mi
525.93 km
11.888 gal (US)
9.9 gal (Imp)
45 L
400.63 kWh
$3.479
($41.36 total for this fill)
27.49 mpg (US)
33.01 mpg (Imp)
8.56 L/100 km
3.64 gal (US)/100 mi
1225.92 Wh/mi
Most of my miles have been commuting to work and driving during work (all city driving).
2012-11-21 344 mi
553.61 km
12.158 gal (US)
10.12 gal (Imp)
46.02 L
409.72 kWh
$3.579
($43.51 total for this fill)
28.29 mpg (US)
33.99 mpg (Imp)
8.31 L/100 km
3.53 gal (US)/100 mi
1191.05 Wh/mi
Mostly city driving. Morning commutes through stop and go traffic. This is my new normal.
2012-11-13 355 mi
571.32 km
12.244 gal (US)
10.2 gal (Imp)
46.35 L
412.62 kWh
$3.619
($44.31 total for this fill)
28.99 mpg (US)
34.8 mpg (Imp)
8.11 L/100 km
3.45 gal (US)/100 mi
1162.31 Wh/mi
2012-10-28 312.1 mi
502.28 km
11.126 gal (US)
9.27 gal (Imp)
42.12 L
374.95 kWh
$3.699
($41.16 total for this fill)
28.05 mpg (US)
33.67 mpg (Imp)
8.39 L/100 km
3.56 gal (US)/100 mi
1201.38 Wh/mi
Still had the brake dragging for some of this trip.
2012-10-20 324 mi
521.43 km
12 gal (US)
9.99 gal (Imp)
45.42 L
404.4 kWh
27 mpg (US)
32.43 mpg (Imp)
8.71 L/100 km
3.7 gal (US)/100 mi
1248.15 Wh/mi
These are not the real values. My friend was nice enough to pay for my tank, but he kept the receipt. I know it came out to ~27mpg. I autocrossed that weekend, and also learned that my left rear break was dragging. I noticed it wasn't maintaining its speed while coasting, even down hill. I took it into the shop and had it fixed. Hopefully that explained this poor tank average (and my less than stellar autox times).
2012-09-28 389.7 mi
627.16 km
12.215 gal (US)
10.17 gal (Imp)
46.24 L
411.65 kWh
$3.859
($47.14 total for this fill)
31.9 mpg (US)
38.32 mpg (Imp)
7.37 L/100 km
3.13 gal (US)/100 mi
1056.33 Wh/mi
Normal driving. Mix of urban, suburban and highway driving.
2012-09-09 365 mi
587.41 km
11.383 gal (US)
9.48 gal (Imp)
43.09 L
383.61 kWh
32.07 mpg (US)
38.5 mpg (Imp)
7.34 L/100 km
3.12 gal (US)/100 mi
1050.99 Wh/mi
2012-09-02 315.4 mi
507.59 km
11.987 gal (US)
9.98 gal (Imp)
45.38 L
403.96 kWh
26.31 mpg (US)
31.6 mpg (Imp)
8.94 L/100 km
3.8 gal (US)/100 mi
1280.79 Wh/mi
I attended a performance driving school, thrashed the car all day.
2012-08-25 333.7 mi
537.04 km
10.83 gal (US)
9.02 gal (Imp)
41 L
364.97 kWh
30.81 mpg (US)
37 mpg (Imp)
7.63 L/100 km
3.25 gal (US)/100 mi
1093.71 Wh/mi
Pumped the tire-pressure up from the 30's to the 40's before autocrossing it on the 19th. It seemed to make a significant difference because I seemed to be getting worse mileage up until that point. Same mix of commuting, highway, suburban errands and on-work runs in the city.

I think I'll take all tires to max sidewall.
2012-08-15 388.5 mi
625.23 km
13.26 gal (US)
11.04 gal (Imp)
50.19 L
446.86 kWh
29.3 mpg (US)
35.19 mpg (Imp)
8.03 L/100 km
3.41 gal (US)/100 mi
1150.22 Wh/mi
What I'll consider typical driving: errands, commuting both into the city or just to the train station.
2012-08-01 341.6 mi
549.75 km
11.879 gal (US)
9.89 gal (Imp)
44.97 L
400.32 kWh
28.76 mpg (US)
34.54 mpg (Imp)
8.18 L/100 km
3.48 gal (US)/100 mi
1171.9 Wh/mi
Use: Driving throughout Phila., extended time in stop-and-go traffic, many short trips (10+ stops w/in 7 mi), needed to use a/c and 9 passes in autocross.

I don't expect my driving conditions to regularly be so disadvantageous to fuel economy. If this is the worse tank I'll average, I'll be very pleased.

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


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