Global benchmark Brent crude futures rose by 8 cents, or 0.14%, to $58.40 a barrel at 1125 GMT. U.S. West Texas Intermediate (WTI) futures were up 10 cents, or 0.19%, at $52.69.
"No two ways about it, U.S.-China trade talks will be front and centre on the agenda across global markets, including oil," said BNP Paribas oil strategist Harry Tchilinguirian.
"This jitteriness just goes to show how much emphasis the market places on the outcome of these talks in terms of the global economic outlook."
Both benchmarks are down more than 20% from April peaks.
The front-month spread between November and December U.S. crude futures CLc1-CLc2 slipped into contango - where future prices are higher than nearby prices - on Wednesday for the first time in three weeks.
Prices were also weighed down by a report of rising stockpiles in the United States, currently the world's biggest oil producer.
U.S. crude stocks rose by 2.9 million barrels in the week to Oct. 4, the Energy Information Administration (EIA) said on Wednesday, more than double analyst expectations.
Additionally, the Organization of the Petroleum Exporting Countries has adjusted its production pact to allow Nigeria to raise its output, adding more supply.
OPEC member Venezuela will also increase its exports despite U.S. economic sanctions that have curtailed shipments.
Indian refiner Reliance Industries plans to start loading Venezuelan crude after a four-month pause, in a further sign of expanding crude supply to the market.
But in a sign supply could yet tighten, OPEC's secretary general Mohammad Barkindo, when asked about the prospect of a deeper oil supply cut in December, said: "All options are open."
"The oil market is neither bullish nor bearish. It is not trending. It has no reason or excuse to trend," said Tamas Varga of oil brokerage PVM.
"It would be stretching it to say that the market is paralysed, but it is in a stalemate. No one is willing to commit to either direction."
(Additional reporting by Jane Chung Editing by David Goodman and David Evans) ((Noah.email@example.com; +442075427714))