From Myra P. Saefong: Oil futures fell on Friday, with losses fed by worries over a slowdown in global energy demand, but prices climbed for a third straight week on expectations for tighter crude supplies. May West Texas Intermediate oil CLK9, -1.68% fell 94 cents, or 1.6%, to finish at $59.04 a barrel on the New York Mercantile Exchange. The contract still rose about 0.4% for the week, according to FactSet data.