Gas prices have fallen again in North Bay coinciding with another drop with the price of oil.Gas in the Gateway City now goes for a buck-16 a litre and oil is in the 85 dollars a barrel range. It was in the 100 dollar range just a few weeks ago.But in other northern centres gas has barely moved.Many communities still sell gas above a dollar 30 a litre, including Timmins, Kapuskasing and Elliot Lake, with only a handful below that level.