Crude oil prices turned higher Friday morning, topping $93 per barrel as equities rose in Asia and Europe. West Texas Intermediate crude oil for October delivery has had an up and down week, making a run toward $100 per barrel Monday, then sliding to less than $93 Thursday. In the latest correction on the New York Mercantile Exchange, crude oil added 88 cents to $93.30 per barrel. Natural gas added 7.1 cents to $2.868 per million British thermal units. Home heating oil gained 1.86 cents to $3.1116 per gallon. Reformulated blendstock gasoline added 3.01 cents to $2.812 per gallon. At the pump, the average price for a gallon of regular unleaded gasoline was $3.833 per gallon, down from Thursday\'s $3.846, AAA reported.