* Driving conditions: City driving will yield significantly lower MPG than highway driving. Terrain (hills, mountains) will also impact fuel economy.
* Vehicle condition: Properly maintained vehicles (tune-ups, tire pressure, etc.) generally get better gas mileage.
* Driver habits: Aggressive driving significantly reduces fuel economy.
* Specific engine and transmission: While it's a Vortec V6, there were slight variations. The transmission (automatic vs. manual) also makes a difference.
However, you can expect generally poor fuel economy for a vehicle of this type, age, and size. Real-world figures are typically in the range of:
* City: 12-15 MPG
* Highway: 16-18 MPG
Keep in mind that these are estimates. You might see slightly better or worse mileage depending on the factors listed above. It's unlikely to achieve higher than the high end of those ranges, and could easily be lower, especially in city driving.
