6.4 Hemi Trucks

I have an 09 Ram with 5.7 Hemi.I normally get 17 to 18 mpg around town,and i've gotten as much as 22 mpg on hgwy(empty bed not towing)Towing is a different story,I get about 12 mpg towing .This is ok for me because I drive my truck every day and tow accosinally.I love my truck......................................Jeff