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Fuel log graph
Efficiency log for: Woody - 1990 Mercury Grand Marquis Wagon LS
  • Lifetime Fuel Economy: 18.8 mpg (US), 12.5 L/100 km, 22.6 mpg (Imp)
  • 90-day Fuel Economy: 14.1 mpg (US), 16.6 L/100 km, 17 mpg (Imp)
  • 3-tank Fuel Economy: 19.6 mpg (US), 12 L/100 km, 23.5 mpg (Imp)
  • EPA Combined Rating / % over rating: 18 mpg (US) / -21.5% (based on 90-day fuel economy)
  • Total fills: 11
  • Average cost per gal/L: $2.80 per gal (US); $0.00 per L (price data entered for 11 fill/s)
  • Average cost per fill: $42.70
  • Average distance cost: $0.15 per mi. / $0.09 per km
  • Total fuel used: 167.73 gal (US), 634.9 L
  • Total distance traveled: 3156.6 mi. / 5080 km
  • Total cost: $469.66
  • Total fuel saved vs. EPA: 7.6 gal. (US) / 28.8 L
  • Total saved: $21.28 (based on avg. cost per gal./L)
  • Average tank distance: 287 mi. / 461.8 km
Fill date Distance Fill amount Price Fuel Economy Details
2017-07-31 208.5 mi
335.55 km
14.757 gal (US)
12.29 gal (Imp)
55.86 L
497.31 kWh
$3.209
($47.36 total for this fill)
14.13 mpg (US)
16.97 mpg (Imp)
16.65 L/100 km
7.08 gal (US)/100 mi
2385.18 Wh/mi
OATF: 233,206.5

Idling over winter tank. Filled with 91 E0.
2016-09-28 602.4 mi
969.47 km
27.279 gal (US)
22.71 gal (Imp)
103.26 L
919.3 kWh
$2.266
($61.81 total for this fill)
22.08 mpg (US)
26.53 mpg (Imp)
10.65 L/100 km
4.53 gal (US)/100 mi
1526.06 Wh/mi
OATF: 232,998

If I didn't lose a gas receipt (there were two) this is accurate. Includes a partial fill that was intended to be a full fill which I didn't pre-pay quite enough for. Actual price is a penny less than posted.

After I filled this up about 25-40 miles later the brakes seemed to be acting up and vibrating the car. I didn't have as much coasting distance so this upcoming tank may be lower though it might mostly count as HWY driving.

Speedometer's still incorrect. Mileage on odometer said 615.65 so it's between the posted mileage and 22.49.
2016-07-02 346.05 mi
556.91 km
17.086 gal (US)
14.23 gal (Imp)
64.68 L
575.8 kWh
$2.499
($42.7 total for this fill)
20.25 mpg (US)
24.32 mpg (Imp)
11.61 L/100 km
4.94 gal (US)/100 mi
1663.92 Wh/mi
Counting a partial fill of 4.001 at Clarion Sheetz. The other 13.085 was at Clarion University Korner. Same price at both. Mileage is still incorrect, probably by 2.2 per hundred miles so it's 7.7 miles off. (read: 353.75, actual: probably closer to 346.05)

Tailpipe gave out at about 180-185 into the tank so the pipe was replaced.
2016-06-02 265.1 mi
426.64 km
14.752 gal (US)
12.28 gal (Imp)
55.84 L
497.14 kWh
$2.459
($36.28 total for this fill)
17.97 mpg (US)
21.59 mpg (Imp)
13.09 L/100 km
5.56 gal (US)/100 mi
1875.29 Wh/mi
Fill at Clarion Uni Korner Pump 2. Changed oil to Pennzoil Platinum High Mileage 5w30 approx. 70 miles before refill, added Amsoil Performance Improver Gas Additive after refill.
2016-04-01 484.5 mi
779.73 km
22.165 gal (US)
18.46 gal (Imp)
83.9 L
746.96 kWh
$2.298
($50.94 total for this fill)
21.86 mpg (US)
26.25 mpg (Imp)
10.76 L/100 km
4.57 gal (US)/100 mi
1541.71 Wh/mi
I put Amsoil 75w90 Severe Gear Oil in the Differential during this tank. This tank includes a few partial fills and I believe I'm missing at least one so this tank is likely invalid:

2015-December-4: 4 Gallons of 100% Gas at $2.999 at County Fair Pump 13 (Route 322 West a few miles from Clarion) Added 12 Oz. Methanol Antifreeze Here. (Found a bottle for free.)

2016-March-7: 5.002 Gallons of 87 w/up to 10% Eth. ($1.999 per.) at Sheetz Clarion PA Pump 2.

2016-April-1: 13.163 Gallons of 87 (Up to 10% eth.) at Sheetz Pump #9 in Cranberry (The one by Seneca, not Cranberry Twp.) PA. Put in 12 Oz. of HEET Methanol on the way home ($1.68 w/tax).

I also think the "Miles Traveled" meter, odometer and speedometer are all off. If I'm going 59 on the speedometer the GPS says I'm going 55, so MPG figures are actually slightly less than reported as of yet.

*Price per gallon is actually $2.2985, it was $50.95 to fill this many*
2015-08-24 204 mi
328.31 km
11.327 gal (US)
9.43 gal (Imp)
42.88 L
381.72 kWh
$2.659
($30.12 total for this fill)
18.01 mpg (US)
21.63 mpg (Imp)
13.06 L/100 km
5.55 gal (US)/100 mi
1871.18 Wh/mi
Added some HEET (Red bottle) this tank.
2015-05-15 239.1 mi
384.79 km
17.168 gal (US)
14.3 gal (Imp)
64.99 L
578.56 kWh
$2.999
($51.49 total for this fill)
13.93 mpg (US)
16.72 mpg (Imp)
16.89 L/100 km
7.18 gal (US)/100 mi
2419.74 Wh/mi
A part idling over the winter tank.

Part-Fill: 4 gallons, 100% gas (91 grade, $3.459)
Complete fill (On date logged): 13.168 gallons, Up to 10% ethanol (87 grade, $2.859)

Oil, Oil Filter, 2/3 of the ATF and the ATF Filter were all changed before the end of this tank.
2014-09-25 235.7 mi
379.32 km
12.947 gal (US)
10.78 gal (Imp)
49.01 L
436.31 kWh
$3.199
($41.42 total for this fill)
18.2 mpg (US)
21.86 mpg (Imp)
12.92 L/100 km
5.49 gal (US)/100 mi
1851.12 Wh/mi
Filled at Brookville GETGO; Pump 7?

This is with at least 30 minutes of idling due to a radiator flush.
2014-08-27 86.65 mi
139.45 km
3.868 gal (US)
3.22 gal (Imp)
14.64 L
130.35 kWh
$3.469
($13.42 total for this fill)
22.4 mpg (US)
26.91 mpg (Imp)
10.5 L/100 km
4.46 gal (US)/100 mi
1504.33 Wh/mi
Filled up at Clarion PA Sheetz Pump 1. Most of these are HWY miles and are all on one trip.

Stuff noted for previous tank in last paragraph still applies to this tank.
2014-08-27 264.65 mi
425.91 km
14.17 gal (US)
11.8 gal (Imp)
53.64 L
477.53 kWh
$3.54
($50.16 total for this fill)
18.68 mpg (US)
22.43 mpg (Imp)
12.59 L/100 km
5.35 gal (US)/100 mi
1804.38 Wh/mi
(First actual MPG Reading for this car.)

Filled up at BP (Or is it a 7/11?) Pump 3 in front of Whole Foods in Wexford, PA.

Tires were around 35 for this tank, A/C used and had roof-rack on car and all mud-flaps. Oil needs changed along with Transmission fluid and other stuff, at this time.

(It really cost $50.17 for this fill. One cent too low.)
2014-08-13 219.9 mi
353.89 km
12.215 gal (US)
10.17 gal (Imp)
46.24 L
411.65 kWh
$3.599
($43.96 total for this fill)
18 mpg (US)
21.62 mpg (Imp)
13.07 L/100 km
5.55 gal (US)/100 mi
1871.99 Wh/mi
First fill-up soon after buying the car. Filled up with 87, tires not checked at fill-up.

Important note: The "Distance since last fill" mark is completely off so don't count it in "Distance Traveled"; The car was bought and 18.4 miles later was filled up. I only have this first fill here as a starting point to track how much is spent and how much fuel was put in. I stuck the miles at a certain number just to get at an even 18 MPG; The MPG figure and miles since last fill-up are meaningless.

Note: At $3.599 and 18 MPG, That's 20 cents per mile.

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


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