My dad just bought a 2011 Hyundai Sonata. His model is not the top of the line but is very comfortable, I drove it aprox 450 miles this weekend, it still has under 1000 miles on it, I got tired of watching the gas gauge not move so i pulled over and filled it up after 188 miles of driving and the mpg hand figured was 40.68 mpg. This was strictly freeway,at 70 mph, and country road,60 mph, driving.
On the way home we were closer to the epa sticker of 35 mpg, ringing in 35.9 mpg.
The car has a 4 cylinder engine and it has lots of get up and go, Personally I would have bought the next higher interior package but it was quiet and easy to drive and will seat five folks easily.