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Fuel log graph
Efficiency log for: Burnt's Cobalt - 2009 Chevy Cobalt LT XFE
  • Lifetime Fuel Economy: 37.6 mpg (US), 6.3 L/100 km, 45.2 mpg (Imp)
  • 90-day Fuel Economy: 38.7 mpg (US), 6.1 L/100 km, 46.4 mpg (Imp)
  • 3-tank Fuel Economy: 39.3 mpg (US), 6 L/100 km, 47.2 mpg (Imp)
  • EPA Combined Rating / % over rating: 28 mpg (US) / 38.1% (based on 90-day fuel economy)
  • Total fills: 21
  • Average cost per gal/L: $2.22 per gal (US); $0.00 per L (price data entered for 20 fill/s)
  • Average cost per fill: $23.30
  • Average distance cost: $0.06 per mi. / $0.04 per km
  • Total fuel used: 220.97 gal (US), 836.5 L
  • Total distance traveled: 8309 mi. / 13372.1 km
  • Total cost: $465.98
  • Total fuel saved vs. EPA: 75.8 gal. (US) / 286.9 L
  • Total saved: $168.28 (based on avg. cost per gal./L)
  • Average tank distance: 395.7 mi. / 636.8 km
Fill date Distance Fill amount Price Fuel Economy Details
2010-07-21 406.1 mi
653.55 km
9.98 gal (US)
8.31 gal (Imp)
37.78 L
336.33 kWh
$2.74
($27.35 total for this fill)
40.69 mpg (US)
48.87 mpg (Imp)
5.78 L/100 km
2.46 gal (US)/100 mi
828.2 Wh/mi
2010-07-04 416.9 mi
670.94 km
10.93 gal (US)
9.1 gal (Imp)
41.37 L
368.34 kWh
$1.77
($19.35 total for this fill)
38.14 mpg (US)
45.81 mpg (Imp)
6.17 L/100 km
2.62 gal (US)/100 mi
883.52 Wh/mi
2010-06-21 494 mi
795.02 km
12.6 gal (US)
10.49 gal (Imp)
47.7 L
424.62 kWh
$2.75
($34.65 total for this fill)
39.21 mpg (US)
47.09 mpg (Imp)
6 L/100 km
2.55 gal (US)/100 mi
859.55 Wh/mi
2010-05-25 454.9 mi
732.09 km
12 gal (US)
9.99 gal (Imp)
45.42 L
404.4 kWh
$2.57
($30.84 total for this fill)
37.91 mpg (US)
45.54 mpg (Imp)
6.2 L/100 km
2.64 gal (US)/100 mi
888.99 Wh/mi
2010-05-14 476.7 mi
767.17 km
11.89 gal (US)
9.9 gal (Imp)
45.01 L
400.69 kWh
$2.74
($32.58 total for this fill)
40.09 mpg (US)
48.15 mpg (Imp)
5.87 L/100 km
2.49 gal (US)/100 mi
840.55 Wh/mi
2010-05-07 274.6 mi
441.93 km
7.047 gal (US)
5.87 gal (Imp)
26.68 L
237.48 kWh
$2.79
($19.66 total for this fill)
38.97 mpg (US)
46.78 mpg (Imp)
6.04 L/100 km
2.57 gal (US)/100 mi
864.82 Wh/mi
wife is coming along with the hypermiling tricks
2010-05-01 389.3 mi
626.52 km
10.88 gal (US)
9.06 gal (Imp)
41.19 L
366.66 kWh
$2.17
($23.61 total for this fill)
35.78 mpg (US)
42.97 mpg (Imp)
6.57 L/100 km
2.79 gal (US)/100 mi
941.84 Wh/mi
wife practicing stick shift, had some horrible traffic situations - stuck on a highway for an hour because of an accident
2010-04-18 405.2 mi
652.11 km
10.03 gal (US)
8.35 gal (Imp)
37.97 L
338.01 kWh
$2.79
($27.98 total for this fill)
40.4 mpg (US)
48.53 mpg (Imp)
5.82 L/100 km
2.48 gal (US)/100 mi
834.18 Wh/mi
2010-04-09 472.3 mi
760.09 km
11.66 gal (US)
9.71 gal (Imp)
44.14 L
392.94 kWh
$0.25
($2.92 total for this fill)
40.51 mpg (US)
48.64 mpg (Imp)
5.81 L/100 km
2.47 gal (US)/100 mi
831.97 Wh/mi
warmer weather
2010-03-28 458.6 mi
738.05 km
12.17 gal (US)
10.13 gal (Imp)
46.07 L
410.13 kWh
$2.67
($32.49 total for this fill)
37.68 mpg (US)
45.27 mpg (Imp)
6.24 L/100 km
2.65 gal (US)/100 mi
894.31 Wh/mi
valley review, pediatric rotation (end of month 1)
no eoc, no p&g, just dwl
2010-03-16 436 mi
701.67 km
11.76 gal (US)
9.79 gal (Imp)
44.52 L
396.31 kWh
$2.4
($28.22 total for this fill)
37.07 mpg (US)
44.54 mpg (Imp)
6.34 L/100 km
2.7 gal (US)/100 mi
908.97 Wh/mi
starting to warm up, took off part of the lower grill block (packing tape) just to see what the difference in temp would be
2010-03-07 407.4 mi
655.65 km
11.24 gal (US)
9.36 gal (Imp)
42.55 L
378.79 kWh
$2.1
($23.6 total for this fill)
36.25 mpg (US)
43.53 mpg (Imp)
6.49 L/100 km
2.76 gal (US)/100 mi
929.77 Wh/mi
cold
2010-02-23 340.8 mi
548.46 km
9.51 gal (US)
7.92 gal (Imp)
36 L
320.49 kWh
$2.65
($25.2 total for this fill)
35.84 mpg (US)
43.03 mpg (Imp)
6.56 L/100 km
2.79 gal (US)/100 mi
940.4 Wh/mi
ice and snow
2010-02-16 397.4 mi
639.55 km
10.41 gal (US)
8.67 gal (Imp)
39.41 L
350.82 kWh
$2.43
($25.3 total for this fill)
38.17 mpg (US)
45.84 mpg (Imp)
6.16 L/100 km
2.62 gal (US)/100 mi
882.79 Wh/mi
wicked cold, no EOC, almost no P&G, a lot of DWL
2010-02-04 385 mi
619.6 km
10.54 gal (US)
8.78 gal (Imp)
39.9 L
355.2 kWh
$1.099
($11.58 total for this fill)
36.53 mpg (US)
43.85 mpg (Imp)
6.44 L/100 km
2.74 gal (US)/100 mi
922.6 Wh/mi
normal commuting

edit: i was really confused by the avg on this one....my onboard computer said I was at 38.4. oh well
2010-01-27 367.2 mi
590.95 km
9.506 gal (US)
7.91 gal (Imp)
35.98 L
320.35 kWh
$2.599
($24.71 total for this fill)
38.63 mpg (US)
46.42 mpg (Imp)
6.09 L/100 km
2.59 gal (US)/100 mi
872.41 Wh/mi
Freezing, at a new hospital/clinical site (until march)

Scraping ice off the car at 5am

have found some great EOC/bump start spots on my commute, also habitually incorporating DWL and P&G

edit: surprised at my actual mpg calculated here - my onboard mpg calculator had me at 38.3...must be from the EOC and my calculator not accounting for the portion when my engine is completely turned off, before i turn the electronics back on
2010-01-16 405.8 mi
653.07 km
11.71 gal (US)
9.75 gal (Imp)
44.33 L
394.63 kWh
$2.78
($32.55 total for this fill)
34.65 mpg (US)
41.62 mpg (Imp)
6.79 L/100 km
2.89 gal (US)/100 mi
972.47 Wh/mi
very cold, terrible roads

traveled to CA for 11 days, did not use the car

just transferred to another hospital for a couple months, barring really bad weather the milage should improve
2009-12-21 466.3 mi
750.44 km
11.24 gal (US)
9.36 gal (Imp)
42.55 L
378.79 kWh
$2.55
($28.66 total for this fill)
41.49 mpg (US)
49.82 mpg (Imp)
5.67 L/100 km
2.41 gal (US)/100 mi
812.33 Wh/mi
to dayton and back, lots of P&G 55-60mph, some EOC

full upper and lower grill blocks now

it could have been much better, but the first quarter tank involved some savage city driving, including a brutal 1 mile bumper to bumper uphill stop and go that really killed the mileage

60-70% highway with this tank
2009-12-16 406.3 mi
653.88 km
11.84 gal (US)
9.86 gal (Imp)
44.82 L
399.01 kWh
$0.689
($8.16 total for this fill)
34.32 mpg (US)
41.21 mpg (Imp)
6.85 L/100 km
2.91 gal (US)/100 mi
982.06 Wh/mi
Put a upper grill block and partial lower on during the last quarter of the tank

using fuel rewards from my local grocery, got a lot of $$ off per gallon

Wife took the car on a 200 mile round trip

My commute ends in the 5th level of a parking garage at the hospital i'm currently at (required parking for students/residents)...its killing my mpg
2009-12-12 366.9 mi
590.47 km
11.44 gal (US)
9.53 gal (Imp)
43.31 L
385.53 kWh
32.07 mpg (US)
38.5 mpg (Imp)
7.33 L/100 km
3.12 gal (US)/100 mi
1050.78 Wh/mi
Taught my wife to drive stick with this tank, still 80% city, 20% highway- the EPA has been adjusted to reflect this driving ratio (27mpg average), so right now I'm at 16.7%. I feel like that's cheating though, since the 50/50 EPA mpg average is 30.

Pumped the tire pressure up to 38 PSI halfway through the tank, I have noticed though that with the cold weather (32 degrees) the tire pressure starts out at 35 PSI in the morning, and then slowly goes up to 37-38 PSI by the end of my drive

free tank of gas thanks to fuel rewards from giant eagle
2009-11-24 81.3 mi
130.84 km
2.585 gal (US)
2.15 gal (Imp)
9.79 L
87.11 kWh
$2.54
($6.57 total for this fill)
31.45 mpg (US)
37.81 mpg (Imp)
7.48 L/100 km
3.18 gal (US)/100 mi
1071.46 Wh/mi
Topped off my tank, reset my trip count and mpg average.......here this is my official start to hypermiling.

My averages are going to suck for a while, as I'm doing about 80% city right now, and because I suck at hypermiling in general, since I'm still a beginner.

I'm interested in keeping this log to see how I improve over time.

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


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