* Vehicle type: A heavier F-350 dually will get considerably worse fuel economy than a lighter F-250.
* Driving style: Aggressive acceleration and high speeds drastically reduce MPG.
* Load: Towing or hauling heavy loads significantly impacts fuel economy.
* Maintenance: Proper maintenance, including regular filter changes and tune-ups, can improve fuel economy.
* Terrain: Hilly or mountainous terrain reduces MPG.
Therefore, there's no single answer. However, you can expect a range of 8-15 MPG under typical driving conditions. Those on the lower end are likely towing heavy loads or driving aggressively, while those on the higher end are likely driving lightly loaded and maintaining a steady speed on relatively flat terrain. You'll often see figures closer to the lower end of that range in real-world use.
