Anyone drive their auto in 5th gear?

I am just wondering if folks with the bad mileage have altered their truck with lifts and bigger and heavier tires. I average around 22 with stock tires.

 

I agree.
I was getting on a TRD OR stock, easily 22 mpg doing 75.
I put on a Gatortrax retractable cover, FN TRD wheels 17" and Nitto Terra Grapplers G2....and lost 2 mpg doing the same 75 mph.
I also, last week, put on a aFe cold air intake, got back 1 mpg.

 

Nope mine is bone stock. Best I can get is 20-21mpgs if I drive it right in 5th gear. In Drive I was averaging 17-18

 

You mean in Drive/OD you averaged around 17-18?

I drive a lot of interstate miles on my daily route 17-18 mpgs seems to be my average no matter what. I wonder if that would change in 5th gear.