Brent crude fell 47 cents, or 1%, to determine the settlement price at $ 44.90 a barrel, while West Texas Intermediate crude for September delivery closed down 35 cents, or 0.8%, to $ 42.58 a barrel in its last trading days.
The more active West Texas October delivery contract fell 29 cents, or 0.7%, to $ 42.82.
The Organization of the Petroleum Exporting Countries and its allies, known as the OPEC + group, said on Wednesday that the pace of the oil market recovery appears slower than expected in light of the growing risks from a long-term second wave of the pandemic.
Sentiment also deteriorated in global markets as US jobless claims rose again to more than a million last week.
Oil prices have ranged from their current range since mid-June, with Brent trading between 40 and 46 dollars a barrel, and West Texas between 37 and 43 dollars a barrel.