NEW YORK, Oct 10 (Reuters) - U.S. crude futures turned lowerin choppy trading on Wednesday, after testing above recentintraday highs above $93 a barrel and with concerns abouteconomic growth hemming in the oil prices even as a tense MiddleEast lends support.

U.S. crude was down 45 cents at $91.94 a barrel at12:45 p.m. EDT (1645 GMT), having swung from $91.57 to $93.66.