Are you eco-driving yet. I'm getting about 30.5 MPG in my 2014 XV Crosstrek (manual trans), which has a combined rating of 26. I do mostly rural driving, some highway, and too much city driving in Washington, DC! Based on my calculations, I spend about 9% of my time idling... getting zero MPG.
I've developed a real world eco-driving game called CarPrint (carprint.xyz). The CarPrint app helps you save money and protect the environment by eco-driving, and it makes driving fun! Check it out.