2004 BMW 6 Series
6 configurations — EPA fuel economy ratings
| Trim / Variant | City MPG | Hwy MPG | Combined MPG | Fuel | Drive | Engine | Transmission |
|---|---|---|---|---|---|---|---|
| 645ci | 15 | 22 | 17 | Premium Gasoline | Rear-Wheel Drive | 4.4L 8-cyl | Automatic (S6) |
| 645ci | 15 | 23 | 18 | Premium Gasoline | Rear-Wheel Drive | 4.4L 8-cyl | Manual 6-spd |
| 645ci | 16 | 24 | 19 | Premium Gasoline | Rear-Wheel Drive | 4.4L 8-cyl | Automatic (S6) |
| 645ci Convertible | 13 | 21 | 16 | Premium Gasoline | Rear-Wheel Drive | 4.4L 8-cyl | Manual 6-spd |
| 645ci Convertible | 16 | 24 | 19 | Premium Gasoline | Rear-Wheel Drive | 4.4L 8-cyl | Automatic (S6) |
| 645ci Convertible | 13 | 21 | 16 | Premium Gasoline | Rear-Wheel Drive | 4.4L 8-cyl | Automatic (S6) |