* Engine size: Econolines came with a range of engine options (V6 and V8). Larger engines mean lower fuel economy.
* Transmission: Automatic transmissions generally get slightly lower mileage than manuals.
* Vehicle condition: Proper maintenance (including tire pressure and tune-ups) drastically affects fuel economy.
* Driving habits: Aggressive driving significantly reduces gas mileage.
* Load: A heavily loaded van will get considerably worse gas mileage than an empty one.
* Whether it's a cargo or passenger van: Passenger vans tend to be slightly heavier and thus less fuel-efficient.
Considering all these variables, expect anywhere from 10 to 18 miles per gallon (mpg) for a 1994 Ford Econoline van. The lower end of that range is more likely if it has a larger engine, is poorly maintained, or is frequently heavily loaded. The higher end is possible with a smaller engine, good maintenance, and light loads, but even then, it's not a fuel-efficient vehicle by modern standards.
