Originally Posted by JTS97Z28
Take all the numbers you saw in the V8 gas mileage thread and add about 1-3mpg to those ;-)
I'm fairly confident that most of the people posting numbers of 14+ MPG on the V8 are either driving like a grannys purely for the purpose of higher mileage or they are taking a sample from a short drive and not an average across a full tank.
Even when driving aggresivly I think the lowest my Jeep has read was about 14.5mpg and that was with no regard at all to mileage. If you were driving the same way with the hemi you will most likely be under 10mpg. That's almost 50% more mileage and is a huge difference in fuel cost especially if you are like me and need to fill up at least once a week. I would say I have a "normal" driving style and can easily hit 17+ combined hwy and city.
In the end it's tough to compare mpg numbers from different people as the way you drive almost plays as much of a role as the engine size.
Edit: as dckcentuar mentioned above the milage most definitly improved after the first 4 or so fill-ups