Crude oil prices topped $98 per barrel Tuesday morning as traders anticipate a draw in U.S. inventories this week. On the New York Mercantile Exchange, West Texas Intermediate crude added $1.14 to $98.48 per barrel. Reformulated gasoline blendstock for January gained 2.5 cents to $2.6999 a gallon. January heating oil gained 3.08 cents to reach $3.0451 a gallon while natural gas added 6 cents to reach $4.28 per million British thermal units. The national average price of unleaded regular gasoline dropped slightly to $3.259 a gallon from Monday's $3.263 a gallon, the AAA Daily Fuel Gauge Report said.