Oil prices fell for a second day on Wednesday on worries about falling fuel demand after US President Donald Trump's comments doused optimism over China-US trade talks and reignited concerns on global economic growth.
Brent crude futures fell 46 cents to $62.64 a barrel by 0104 GMT, while US West Texas Intermediate crude CLc1 dropped to $56.89, down 40 cents.
Both prices have fallen to their lowest since before the attack on Saudi Arabian oil facilities on Sept. 14.
"What really pulled the rug from underneath oil was Donald Trump's comments on trade last night.... He's still maintaining quite a belligerent position," said Jeffrey Halley, senior market analyst for Asia Pacific at OANDA.
Trump criticized China's trade practices at the United National General Assembly on Tuesday and said he would not accept a "bad deal" in US-China trade negotiations.
China is the world's largest oil importer and second-largest crude user while the United States is the largest consumer.
Trump also said he saw a path to peace with Iran even as he denounced Iran for "bloodlust", cooling geopolitical premiums in oil prices.
Oil rallied last week following a crippling attack on Saudi Arabia's oil installations that has disrupted supplies from the world's top exporter. To meet its supply obligations to Saudi refineries overseas, Saudi Aramco is buying oil from other Middle East producers.
"The risk premium has died off for now," Halley said, adding that the main driver for oil markets now is trade uncertainty that could impact demand.
Prices were also weighed down by an unexpected build in US crude inventories last week.
US crude inventories rose 1.4 million barrels last week, the American Petroleum Institute said on Tuesday, compared with analysts' forecasts of a 200,000-barrel drawdown.
Official government data from the US Energy Information Administration will be released later today.