Mercury Grand Marquis
18 MPG The 2007 Mercury Grand Marquis is EPA-rated at 18 MPG combined (15 city / 23 highway). Over 15,000 miles a year that is about 833 gallons, $2667 a year in fuel, or $0.178 per mile at $3.20/gal.
Across its full 1984–2007 run it averages 18.1 MPG, improving by 2.5 MPG over 24 model years.
Running cost at different fuel prices and mileages
The figure everyone actually wants, and the one the EPA does not publish — because it depends on a fuel price no agency will commit to.
| Fuel price | Per mile | 10,000 mi/yr | 15,000 mi/yr | 20,000 mi/yr |
|---|---|---|---|---|
| $2.50/gal | $0.139 | $1389 | $2083 | $2778 |
| $3.00/gal | $0.167 | $1667 | $2500 | $3333 |
| $3.20/gal | $0.178 | $1778 | $2667 | $3556 |
| $3.50/gal | $0.194 | $1944 | $2917 | $3889 |
| $4.00/gal | $0.222 | $2222 | $3333 | $4444 |
| $4.50/gal | $0.250 | $2500 | $3750 | $5000 |
| $5.00/gal | $0.278 | $2778 | $4167 | $5556 |
Every model year
| Year | Combined | City | Highway | EPA fuel cost/yr | CO₂ g/mi | Trims |
|---|---|---|---|---|---|---|
| 2007 | 18 MPG | 15 | 23 | $3450 | 494 | 2 |
| 2006 | 18 MPG | 15 | 23 | $3450 | 494 | 2 |
| 2005 | 19 MPG | 16 | 23 | $3300 | 468 | 1 |
| 2004 | 18 MPG | 15 | 23 | $3450 | 494 | 1 |
| 2003 | 18 MPG | 16 | 23 | $3450 | 494 | 1 |
| 2002 | 18 MPG | 15 | 23 | $3450 | 494 | 1 |
| 2001 | 18 MPG | 16 | 23 | $3450 | 494 | 1 |
| 2000 | 18 MPG | 16 | 23 | $3450 | 494 | 1 |
| 1999 | 18 MPG | 15 | 22 | $3450 | 494 | 1 |
| 1998 | 18 MPG | 15 | 22 | $3450 | 494 | 1 |
| 1997 | 18 MPG | 15 | 23 | $3450 | 494 | 1 |
| 1996 | 18 MPG | 15 | 23 | $3450 | 494 | 1 |
| 1995 | 18 MPG | 15 | 23 | $3450 | 494 | 1 |
| 1994 | 18 MPG | 16 | 23 | $3450 | 494 | 1 |
| 1993 | 19 MPG | 16 | 24 | $3300 | 468 | 1 |
| 1992 | 19.5 MPG | 16.5 | 23.5 | $3200 | 456 | 2 |
| 1991 | 18 MPG | 15 | 22 | $3450 | 494 | 1 |
| 1990 | 18 MPG | 15 | 22 | $3450 | 494 | 1 |
| 1989 | 18 MPG | 15 | 22 | $3450 | 494 | 1 |
| 1988 | 18 MPG | 15 | 22 | $3450 | 494 | 1 |
| 1987 | 19 MPG | 16 | 24 | $3300 | 468 | 1 |
| 1986 | 19 MPG | 16 | 24 | $3300 | 468 | 1 |
| 1985 | 17 MPG | 14 | 22 | $3650 | 523 | 1 |
| 1984 | 15.5 MPG | 13.5 | 19.5 | $4025 | 574 | 2 |
Where a model year offered several engines or drivetrains, the figure is the average across all EPA-tested trims that year — the trim count is shown so you can see how much averaging is involved.
How it compares in its class
Among the 149 large cars models tracked here, the Mercury Grand Marquis ranks 97 on current figures, against a class average of 21.6 MPG.
Closest more-efficient alternatives in the same class: Cadillac DeVille (18.5), BMW 550i Gran Turismo (19), BMW 750i xDrive (19), BMW 750Li (19), BMW 750Li xDrive (19).
Tailpipe CO₂ is rated at 494 grams per mile, which works out to roughly 7.4 tonnes a year at 15,000 miles.
Questions
What MPG does the Mercury Grand Marquis get?
The 2007 Mercury Grand Marquis is rated at 18 MPG combined by the EPA — 15 city and 23 highway. Across all 24 model years in the database it averages 18.1 MPG, ranging from 15 to 20 depending on year and trim.
How much does a Mercury Grand Marquis cost in fuel per year?
At 18 MPG and 15,000 miles a year, it burns about 833 gallons — roughly $2667 a year with fuel at $3.20 a gallon, or $0.178 per mile. The EPA's own published annual figure for the 2007 model is $3450.
Has the Mercury Grand Marquis become more efficient over time?
Yes. It has gone from 15.5 MPG in 1984 to 18 in 2007 — an improvement of 2.5 MPG, or 16% across 24 model years.
Is the Mercury Grand Marquis efficient for its class?
It ranks 97 of 149 in the Large Cars class on current figures, against a class average of 21.6 MPG. That is 3.6 worse than typical for the class.
EPA test figures from fueleconomy.gov. Cost per mile and annual fuel spend are computed at a reference price of $3.20 per gallon — use your own price. Estimates based on official test figures and average fuel prices. Real-world consumption varies with driving style, load, terrain and maintenance.