2wd or 4wd? 3:31 or 3:55 rear? How many miles on your truck? Running any additive?

Sorry for the 20 questions game, just wondering if I'm doing something wrong as I don't see anywhere near that mileage and the bulk of my driving is from 900'-2000' and mostly pancake flat.


I can walk on water.......................but I do stagger a bit on alcohol.