* Engine size: The E150 came with a variety of engine options (V6, V8), and larger engines consume more fuel.
* Transmission: Automatic transmissions generally have slightly lower fuel economy than manuals (though manuals were less common in this model year).
* Vehicle condition: Proper maintenance (tire pressure, tune-ups) impacts fuel efficiency.
* Driving habits: Aggressive driving significantly reduces gas mileage.
* Load: Carrying a heavy load reduces fuel economy.
* Terrain: Driving in hilly or mountainous areas reduces gas mileage.
Therefore, there's no single answer. However, you can expect generally poor fuel economy for this van compared to modern vehicles. You might see figures ranging from 10-15 MPG in combined city/highway driving, but it could be lower depending on the factors listed above. To get a more precise estimate, you'd need to know the specific engine and transmission of the van in question. You could also look up fuel economy information specific to that engine and transmission combination on sites like fueleconomy.gov (though data might be limited for older vehicles).
