Gare,
Yeah, it's got a Hemi.
Gas mileage in the city is horrid. I'm getting between 12-13 MPG, sometimes less. I'm going to have it tuned up to see if that helps. Failing that, I'm going to install dual exhausts since I'm told that helps with mileage.
Highway mileage is about 19-20 MPG, about average for American, V8, full-size trucks.
The milage sucks, but it goes like stink and can carry just about anything. When I moved back to NC from Northern VA, I had all 8 (at the time; I've got 18 now) of my basses on the floor in the back seat (it's got the fold flat floor under the rear seats; very handy), and my Ampeg stack and BA115 Combo in the bed.
Alan