At 21 mpg city, 30 highway with the base four-cylinder engine, the 2013 Dodge Avenger lands near the back of the pack.
The same goes for versions with the Pentastar V-6, at 19/29--though we've noted numbers in the low twenties in spirited driving.
With the SXT model you upgrade to the six-speed automatic with the four-cylinder. That's more responsive and agreeable, and it achieves better real-world results. Oddly, it's actually rated 1 mpg lower in the EPA city test (but 1 mpg higher on the highway), for a rating of 20/31 altogether.
As such, the 2013 Avenger is no standout, and not a good choice for those who want to make a green choice among mid-size sedans.