Hey Mpls....Apple Valley here.
19 mpg ain't bad for city. If you drive carefully and/or get a scan gauge it can go to 20-21, mine will. Highway, like I35, you should get 24-26 on a good day. Remember, you have a 4x4 and are dragging a lot more hardware than the 2x's . Take out the secondary, get an AFE air filter and go to synthetic, that'll help a little.