* Engine size: The 1994 F-250 diesel came with different engine options (e.g., 7.3L IDI). Larger engines generally get worse fuel economy.
* Transmission: Automatic or manual transmissions will impact MPG.
* Vehicle condition: Proper maintenance and tune-ups affect fuel efficiency.
* Driving habits: Aggressive driving significantly reduces fuel economy.
* Load: Hauling heavy loads dramatically decreases MPG.
* Terrain: Driving in mountainous areas or off-road will lower MPG compared to flat, paved roads.
Therefore, there's no single MPG figure. However, you can expect a range of 12-18 mpg as a *rough estimate* under *average* conditions for a 1994 Ford F-250 diesel. Real-world MPG could be higher or considerably lower depending on the factors listed above. You'll find more precise figures on forums dedicated to classic Ford trucks or in owner's manuals for specific engine/transmission combinations.
