I hear you, I'm 23 myself and just into one. I love it, stock as of right now. Want to see about the SCT tuners and exhaust tho... Yeah I will admit 4 miles is hard on a diesel. I wouldn't suggest anything but stock for the F150 once the tires start making the dash make noises while going down the road it gets annoying. I had 35x12.5x17 M/T tires by Dick Cepek, great truck tho..