* Engine: The 2009 F-250 Super Duty offered different diesel engine options (likely a 6.4L Power Stroke V8). The specific engine impacts fuel economy.
* Configuration: A regular cab, short-bed truck will get better MPG than a crew cab, long-bed, heavy-duty model.
* Driving style: Aggressive driving significantly reduces fuel economy.
* Terrain: Driving in mountainous areas or off-road reduces fuel economy.
* Load: Hauling heavy loads dramatically decreases MPG.
* Maintenance: Proper maintenance is crucial for optimal fuel economy.
Therefore, there's no single MPG figure. However, you can expect highway MPG to range from approximately 15-20 mpg, and city MPG to be considerably lower, likely in the 10-15 mpg range. These are rough estimates, and your actual mileage will vary.
To find a more precise estimate, you should consult the original owner's manual for your specific 2009 F-250 Super Duty configuration or search online for fuel economy reviews and comparisons of similar vehicles. Websites like the EPA's fueleconomy.gov may offer some data, although specific model year and trim level information is crucial for accurate results.
