Crude prices edged higher on Friday, but posted yet another weekly decline on worries that oversupply would weigh on the U.S. market and that trade disputes and slowing global economic growth would slow demand for oil.
U.S. crude was on track for its seventh consecutive weekly decline and global benchmark Brent was set to drop for a third week.
"One of the biggest concerns out there is that China's demand numbers are coming down if China's GDP growth is slowing," said Tariq Zahir, managing member at Tyche Capital in New York.
U.S. West Texas Intermediate (WTI) crude futures ended Friday's session 45 cents higher at $65.91 a barrel, after touching a session high of $66.39 earlier. For the week, U.S. crude was down 2.5 percent, marking its longest losing streak in three years.
Brent crude oil futures were up 52 cents at $71.95 a barrel by 2:25 p.m. ET, after rising over $1 to hit a high of $72.49 a barrel. Brent was heading for a more than 1 percent weekly loss.