* Driving style: Aggressive acceleration and excessive idling will significantly lower fuel economy.
* Terrain: Driving mostly uphill or in stop-and-go city traffic will reduce MPG compared to highway driving.
* Vehicle condition: Properly maintained vehicles (tune-ups, tire pressure, etc.) generally get better gas mileage.
* Payload and towing: Hauling heavy loads or towing will drastically reduce fuel economy.
It's more likely to be on the lower end of that range (closer to 10 MPG) under typical use, especially if you do a lot of city driving or haul cargo. Highway driving could push it closer to 14 MPG, but that's still optimistic for a truck of that age and size.
