RobJ
Elite Member
I'm still driving a 99 F250 SD that's a 4x4 CC LB with 315's and a small lift. It has a 373 rear end(I did have the speedo reset for the tires). Strictly freeway I can get 13-14. My normal run is from Spring to East Texas so there are some hills and downshifts. Around town combo I get about 11. Pulling my tractor OUT of OD at 60-65 I manage about 9. I keep it out of OD because it'll downshift a lot in the hills. It has about 125,000 miles on it now.
I think the new 6.4 gets about the same as you with the smog motor.
Rob
I think the new 6.4 gets about the same as you with the smog motor.
Rob