Look at the Accord Hybrid
Sister has one and we just came back from a round trip from SF to LA and back
About 450 miles one way and averaged +30 MPG. Commute traffic in SF and LA, why +30, as pure highway would be higher MPG
Could have made it on one tank, but refueled just to have reserve for the LA commuter traffic (reports of heavy congestion). Battery was full most of the trip, so there were many reserve miles (don't know how much, guess you can look that up)
Was in the back seat the whole time. Comfortable and am 185 lbs & 6 foot. Other sister in passenger seat. She has a Mercedes E class diesel and noticed the Accord has more room back there than the Mercedes
On the highway (route 5), she was cruising between 75 to 89 MPH
Trouble free and bought it new 3 years ago
She regrets not getting the plugin option