Crude oil prices slid to less than $105 per barrel Friday on retreating worries over the Middle East and profit-taking as the October contract nears expiration. Recent diplomatic progress with Syria was seen as a sign supply lines would remain operational. Traders also interpreted reports Iranian President Hassan Rouhani said his country will never build nuclear weapons as a sign that more oil could be available to meet demand. On the New York Mercantile Exchange, West Texas Intermediate crude oil for October delivery lost 1.6 percent or $1.72 to reach $104.67 per barrel. Reformulated blendstock gasoline prices dropped 0.97 cents to $2.6875 per gallon. Home heating oil gained 0.33 cents to $3.0073 per gallon. Natural gas dropped 3 cents to $3.69 per million British thermal units. At the pump, the national average price of unleaded gasoline fell to $3.491 per gallon Friday from Thursday\'s $3.494, AAA\'s Daily Fuel Gauge Report said.