i wish i could run 35...im around 27 right now cause of the wide tires and 16 x 7 rims...i need 16 x 8's

 

Probably some of your crappy mileage problem is the amount of rotating mass and resistance you get from having those huge wheels and tires on that truck not to mention if you havent re-calibrated your speedo for the tires and wheels you wont get an accurate reading anyway. All that extra wheel and tire weight will really kill mileage and power not to mention make it harder for the brakes to stop the truck. I have 32x11.50x15 BFG A/Ts on my truck and I run 34-36 PSI in all the tires. Factory 31x10.50x15 BFGs had a door tag reading of 30 psi but the tires sagged quite a bit and wore the outsides of the tires a bit so I pushed them up as well. When the tire shop put my new 32s on they pumped them to 44psi till I pitched a fit because the way it was gonna ride.

 

I run 35/35...I don't mind the stiff ride. I think it helps with that 'feathering' wear the rangers all seem to get.