Oil has plunged around $15 a barrel over the past month but gasoline prices have inched down by just a penny in the same span, with persistently high costs at the pump frustrating both inflation-weary drivers and the White House, which again raised concerns about potential price gouging.
Data from the American Automobile Association (AAA) shows national average gasoline prices have fallen from $3.402 a month ago to $3.390 on Nov. 30, or barely over one cent.