The current BMW 6-Series covers up to 1,346 km on a full tank, based on combined-cycle consumption. Figures below are the best-range variant in each generation.
| Years | Powertrain | Range |
|---|---|---|
| 1976–1982 | Combustion | 603 |
| 1982–1989 | Combustion | 700 |
| 2004–2007 | Combustion | 778 |
| 2007–2011 | Combustion | 1,014 |
| 2011–2015 | Combustion | 1,296 |
| 2015–2018 | Combustion | 1,346 |
Range is calculated from each variant’s fuel tank capacity and combined-cycle consumption (tank ÷ consumption × 100), for the best-range variant in each generation — real-world range varies with driving style and conditions. Figures outside a plausible range for the tank size are excluded.