Yeah I thinks it's where I live by and that has isn't good

 

I have the same thing but mine is red iI get lol 13 mpg I just put 31" 10.5" 15" Goodyear authority on mine

 

I have 31" General Grabber AT2's on some heavy weight D-Window wheels with quite an offset and I get about the same gas mileage as Rex with his monster truck... 9-10 average, when I drive down the mountain to go home though I can usually coast enough to get 14mpg! Haha! Coming back is a whole other story though... Stock 3.42 gearing.

 

Might want to consider looking for an axle & front diff swap to get 3.73 gears. I find with 31's the truck drives way better with the 3.73 than it did with the original 3.42's. You'll probably find that your fuel mileage goes up, especially if you do a lot of driving around hills & mountains.

 

(Generally old tires with proper inflation get better mpg)