* Year of the truck: The engine's fuel efficiency improved slightly over the years the 7.3L was in production (1994-2003).
* Vehicle weight: Heavier trucks (duallys, trucks with heavy-duty towing packages) will get worse gas mileage.
* Driving conditions: City driving yields much lower MPG than highway driving. Towing significantly reduces MPG.
* Maintenance: Proper maintenance (including air filter changes, etc.) is crucial for optimal fuel economy.
* Driving style: Aggressive driving will lower MPG.
Considering these factors, it's impossible to give a single MPG figure. However, you can expect a range of:
* Highway: 15-20 MPG (possibly slightly higher with optimal conditions and a lighter truck)
* City: 10-15 MPG (often considerably lower)
* Towing: Significantly lower, often dropping to single digits depending on load and terrain.
To get a more precise estimate, you should consult resources specific to the year and model of the truck you're interested in. Websites like fueleconomy.gov (if data is available for the specific year and model) or online forums dedicated to Ford trucks can provide more tailored information.
