* Condition of the vehicle: A well-maintained engine will generally get better gas mileage than one that's neglected.
* Driving style: Aggressive driving significantly reduces fuel economy.
* Terrain: Off-road driving and driving in mountainous areas will drastically reduce fuel economy.
* Tire inflation: Properly inflated tires improve fuel efficiency.
* Accessories: Added weight from accessories can reduce gas mileage.
Considering these variables, you're unlikely to find a single definitive answer. However, expect to see EPA estimates in the range of 12-15 mpg (miles per gallon) combined (city and highway) and potentially lower in real-world driving conditions. Highway driving might yield slightly better results than city driving.
To get a more precise idea, you could consult owner's manuals from that year, but even then, the actual mileage achieved will vary based on the factors listed above.