What would I do if I cared about fuel economy? I would not drive a truck in the first time.
12mpg seems to be the on lower side of reported real mpg by the users. So the first thing you should check if your driving patterns didn’t change. On my WJ, I could do the same trip with 11 and 17 mpg, just changing the driving style. That’s how big V8’s work.
You can test it by trying to make an economy run (slow acceleration, no braking, minimal hills), and see, if you can get close to mpg declared by factory. If you do, the car is fine.
What would I do if I cared about fuel economy? I would not drive a truck in the first time.
12mpg seems to be the on lower side of reported real mpg by the users. So the first thing you should check if your driving patterns didn’t change. On my WJ, I could do the same trip with 11 and 17 mpg, just changing the driving style. That’s how big V8’s work.
You can test it by trying to make an economy run (slow acceleration, no braking, minimal hills), and see, if you can get close to mpg declared by factory. If you do, the car is fine.