Mid to high 30's. My Mom has a HCH II 2006 Opal Silver Blue. She drives the way you describe and gets mid to high 30's. But when drives to visit my brother, sister in law and toddler nephew, she gets mid to hig 40's. Longer trip,150 miles round trip,for one. Also she does more highway driving and more driving on state route with out many lights or stop signs. Makes a difference.