Well....I've owned both. My 2003 Ranger 4.0, auto, 4x4 long box reg. cab never got any better than 17mpg. My 2005 Ranger X-cab 2x with 4.0 and auto would get right around 20 mpgs. My 2007 F150 with 2x, 4.2 and auto gets 20 mpg. Given the choice I would rather ride in a f150 than a Ranger. That is all......
