2009 Mercury Grand Marquis FFV MPG & Specs — Real-World vs EPA, All Trims
Fuel grade varies by trim — see the breakdown below.
Is the 2009 Mercury Grand Marquis FFV good on gas?
At up to 19 MPG combined, the 2009 Mercury Grand Marquis FFV is about average for a Large Cars — that class averages about 20.3 MPG across 2,605 EPA-tested versions, so it's middle-of-the-road for its size.
Real-world MPG vs the EPA number
The EPA figures above come from a standardized dynamometer test, not the open road — real-world MPG typically runs a bit lower depending on your driving, climate and terrain. That's true of every car on this site, old or new.
For its most efficient trim, the EPA estimates about $3,300 a year in fuel (15,000 miles) — roughly $275 a month.
2009 Mercury Grand Marquis FFV trims & fuel economy
| Trim (engine / transmission) | Fuel | MPG | Fuel/yr (today's price) |
|---|---|---|---|
| 4.6L 8-cyl, Automatic 4-spd, RWD | FLEX-FUEL | 19 | $3,300 |
2009 Mercury Grand Marquis FFV specs
What the EPA test-car listings record for this model year — every combination sold is a row in the trims table above.
| Engine options | 4.6L 8-cyl |
| Transmission | Automatic 4-spd |
| Drive type | RWD |
| EPA body class | Large Cars |
| Fuel | Flex-fuel |
Other years of the Mercury Grand Marquis FFV
Similar cars (Large Cars)
Cars that take premium · Cheapest cars to fuel · Where fuel grade depends on the trim · Fuel guides
1 trim(s) · EPA FuelEconomy.gov data retrieved 2026-07-24 · fuel prices AAA national average as of 2026-07-05.