Lift and Gas milage

you could also try installing a hypertech inline speedometer calibrator. It corrects the speedometer and odometer after putting on different size tires. After installation of the calibrator, it turned out that I really didn't lose too many MPGs, especially on the highway. The only thing is that it costs over $200. But I'm glad I got it so my speedo and odo are accurate.

 

I'm not sure of the exact gear set, but with the stock gear ratio and the lift/tires combo you could definitely benefit from them!

 

I am running 285/70/17 and they are 7% larger than stock 265/65s so basically multiply you odometer by 1.07 and thats the true mileage,

i am on my first tank since the new tires and the odometer is reading 152 at the half tank mark so i have gone about 163 miles on 10 gallons which isnt too horrible

i am planning on adding a new exhaust soon to so that could help out mpg