November Brent crude futures rose 28 cents to $90.92 a barrel at 0300 GMT, while U.S. West Texas Intermediate crude futures for October edged 35 cents higher to $87.64.
The U.S. Federal Reserve is widely expected to leave interest interest rates unchanged at a policy meeting next week, though views are split over whether the Fed will raise rates or pause again in November.
The European Commission on Monday forecast the euro zone to grow more slowly than previously expected in 2023 and 2024.
The IEA last month lowered its 2024 forecast for oil demand growth to 1 million bpd, citing lackluster macroeconomic conditions.
OPEC's August report, meanwhile, kept its 2.25 million bpd demand growth forecast for 2024 unchanged.
Persons:
Nathan Frandino, Brent, Tina Teng, Teng, OPEC's, Jeslyn Lerh, Stephanie Kelly, Jamie Freed
Organizations:
Phillips, American West, REUTERS, bbl, Brent, U.S, West Texas, Traders, CMC, U.S . Federal Reserve, European Central Bank, European, Investors, International Energy Agency, Organization of, Petroleum, IEA, Thomson
Locations:
Rodeo , California, American, U.S, SINGAPORE, Europe, Saudi Arabia, Russia, China, OPEC, Singapore, New York