Crude oil for December delivery was down 0.72% or 0.49 to $67.94 a barrel. Elsewhere in commodities trading, Brent oil for delivery in January fell 0.64% or 0.46 to hit $71.82 a barrel, while the December Gold Futures contract fell 0.99% or 25.50 to trade at $2,561.00 a troy ounce.