Fuel Mileage facts

FABO
I am trying to gather a little data. My job is going to dictate that I commute quite a distance daily. I am trying to plan out this excursion. I looked at new cars and they get anywhere from 18-26 MPG ish. That is the Chally, Charger and new Ram trucks. I currently drive a Tundra and gets around 18 hgwy. The Tundra is going to stay at home with my wife and I will be in the market for something to commute in. In lieu of a Prius what can I get from an A body? C body? I obviously love A's but also love C's. Can you all provide real life examples of good MPG? maybe examples of your commuter combo?