SINGAPORE - Oil prices turned lower in Asian trade Thursday as data showing Chinese manufacturing picking up strongly in March was outweighed by profit taking, analysts said. New York's main contract, light sweet crude for delivery in May, dropped 42 cents to $93.08 a barrel in the afternoon and Brent North Sea crude for May delivery shed 22 cents to $108.50. "Oil is readjusting back to its downtrend on profit-taking," said Ker Chung Yang, senior investment analyst at Phillip Futures in Singapore.