1984 Mercury Grand Marquis
4 configurations — EPA fuel economy ratings
| Trim / Variant | City MPG | Hwy MPG | Combined MPG | Fuel | Drive | Engine | Transmission |
|---|---|---|---|---|---|---|---|
| Grand Marquis | 13 | 19 | 15 | Regular Gasoline | — | 5L 8-cyl | Automatic 4-spd |
| Grand Marquis | 14 | 20 | 16 | Regular Gasoline | — | 5L 8-cyl | Automatic 4-spd |
| Grand Marquis Wagon | 13 | 19 | 15 | Regular Gasoline | — | 5L 8-cyl | Automatic 4-spd |
| Grand Marquis Wagon | 14 | 20 | 16 | Regular Gasoline | — | 5L 8-cyl | Automatic 4-spd |