OPEC+ is discussing a gradual increase to oil output from August, but no decision has been taken on the exact volumes, an OPEC+ source said on Tuesday.
Also boosting prices, refinery throughput in China, the world's second largest oil consumer, rose 4.4% in May from the same month a year ago to a record high.
All three major U.S. stock indexes gained some ground and the S&P 500 and the Dow were last in positive territory, with economically-sensitive small caps and transports lagging.
