Hello guys i traded in my beloved 06-F150 worked/loaded to the max for a 2011 F250 Last year and i tow with it i get 9.0 - 11.0 loaded or not i have a K&N filter (holes in airbox) have a MBRP exhaust on it.. running 285/75/18 toyo's on it... what can i do to better my mpg?