* Driving conditions: City driving yields significantly lower MPG than highway driving. Terrain (hills, mountains) also greatly impacts fuel consumption.
* Driving style: Aggressive acceleration and braking drastically reduce fuel economy.
* Vehicle condition: Properly maintained vehicles (tire pressure, tune-up, etc.) will generally get better mileage.
* Payload and towing: Hauling heavy loads or towing a trailer severely impacts fuel economy.
While a 1996 F-350 with the 7.5L V8 is *not* known for its fuel efficiency, you might see anywhere from 8-12 MPG in mixed driving. Highway driving *might* push it closer to 15 MPG under ideal conditions, but that's on the optimistic side. City driving will likely be considerably lower than 8 MPG.
It's important to remember this is just an estimate. Real-world fuel economy will vary.
