hey guys I just purchased a 2007 dodge megacab with the 6.7. Beautiful truck. It's got a lift and 37 inch tires on it... anyways I'm getting Horrible fuel milage even worse when I pull my trailer. This weekend I got 6.8-6.9 mpg's without trailer I'm about 10 mpg's... it has an edge turner (older model)... any reason why I'm getting such bad gas milage when I have friends getting twice as much? I recently added a new fuel filter and cleaned out my air filter... any help is appreciated! Thanks in advance...

martin