Oil prices edged up on Tuesday as investors expected US data due shortly to show declining crude stocks, which outweighed concerns over US-China trade tensions that could weigh on fuel demand.
Benchmark Brent crude futures were up 46 cents, or 0.7%, at $65.32 a barrel by 10:31 CST.
US crude futures rose 17 cents, or about 0.3%, at $58.07 a barrel.
Sending a bullish signal, a preliminary Reuters poll showed on Monday that US crude oil inventories likely fell for a second consecutive week last week.
The numbers came ahead of crude stock data from the American Petroleum Institute (API), an industry group, at 2030 GMT on Tuesday, and the Energy Information Administration (EIA), an agency of the US Department of Energy, due on Wednesday.
"Private forecasters are seeing a small drop," said Phil Flynn, an analyst at Price Futures Group in Chicago, but added concerns over US-China trade tensions and global growth are also pressuring prices. "We have more questions than answers today."
Weighing on prices, hopes for progress in the trade war between China and the United States during this week's G20 meeting were dampened by a senior US official saying President Donald Trump was "comfortable with any outcome" from the talks.
"The US-China meeting on the side of G20 could signal further rapprochement on trade, but the market needs something it can sink it's teeth into," said Gene McGillian, vice president of market research at Tradition Energy in Stamford, Connecticut.
"We've been going back and forth on US-China trade disputes for over a year now," he added.
Oil prices could rise if Federal Reserve Chairman Jerome Powell, set to give public remarks on Tuesday, hints the Fed will may cut rates, analysts said.
"If (Powell) is more forthcoming about easing plans, that will pump up commodity prices," said John Kilduff, a partner at Again Capital in New York. "The market's on guard for this dovish tone."
Demand concerns were briefly overcome last week when Brent climbed 5% and US crude surged almost 10%, its strongest week since 2016, after Iran shot down a US drone, adding to tensions stoked by previous attacks on oil tankers in the area.
Washington has blamed the tanker attacks on Iran, which denies having any role.
US President Donald Trump targeted Iranian Supreme Leader Ayatollah Ali Khamenei and other top Iranian officials with sanctions on Monday. Iran said this move closed the path of diplomacy.
Meanwhile, the Organization of the Petroleum Exporting Countries and its allies including Russia appear likely to extend a deal on curbing output when they meet on July 1-2.
Russian Energy Minister Alexander Novak said international cooperation on crude production had helped stabilise oil markets and was more important than ever. He also voiced concerns about demand.
The chief executive of Saudi Aramco, the state oil firm of OPEC's de facto leader, said its spare capacity of 12 million barrels per day (bpd) was sufficient and that it would meet its customers' needs.US sanctions on Iran and Venezuela have cut oil exports from the two OPEC members, but US production has been rising.