not bying 30mpg, I drive 62-65mph. no freeway, live at 7000ft. 600mil. a month back- forth to work;banks autominde,ats intake,ats exhaust manf.
aero turbine muffler, ddp economy injectors,s&b intake & filter,tag3, free spin hubs, and all syn. oils. bed cover. 23mpg. verry best. 06 big horn...