How many mpg do you guys get the 5.0 ? I have mud terrain tires on it will that effect it ?

 

Bad. 13 or so.

 

would 4.11 gears make it better or worse ?

 

Oversize tires can decrease your mpg. As far as gears go, what size mud terrains are you running?

 

32x11.50 with no lift and is there anything you can do to increase the mpg ?

 

High flow intake and dual exhuast. Drive like an old man, Coast to red lights, no hard braking, No Hard Acceleration, Keep your fuel system clean, Regular tune ups, keep your air filter clean.

 

17/22. w/stock tires. (when I drive it far enough to get into closed loop function/otherwise I get 11.) Tire size, especially weight will make a difference. That's driving specifically for MPG. In the real world 15/19.

 

While were on the subject what is a Throttle Body Spacer and how does it save gas?

 

it doesnt really....not enough to notice not on a Ford style like our trucks....