* Transmission: Automatic transmissions generally yielded lower MPG than manual transmissions.
* Condition of the vehicle: A well-maintained engine and properly tuned carburetor would get better mileage than a neglected one.
* Driving style: Aggressive acceleration and high speeds drastically reduce fuel economy.
* Terrain: City driving yields lower MPG than highway driving. Off-road driving is even worse.
* Tire condition and inflation: Under-inflated tires increase rolling resistance and lower MPG.
Considering all this, you'd be lucky to see 8-12 MPG in city driving, and maybe 10-15 MPG on the highway. Averages of 10-12 MPG are probably a reasonable expectation. It's important to understand that this is a very broad range, and your actual mileage could be higher or lower. These vehicles were not known for their fuel efficiency.
