Oil prices fluctuated in a tight range Friday, with U.S. oil logging a seven-day winning streak, as traders became cautious after recent solid gains.

The West Texas Intermediate for September delivery increased 0.30 U.S. dollar to settle at 48.22 dollars a barrel on the New York Mercantile Exchange, while Brent crude for October delivery fell 0.01 dollar to close at 50.88 dollars a barrel on the London ICE Futures Exchange.

Source : XINHUA