U.S. crude oil about 2 percent on Monday, bolstered by a rally in U.S. gasoline and Russia's willingness to meet other major oil producers to discuss the market.
Higher stock prices on Wall Street and a softer dollar provided further support to oil and other dollar-denominated commodities.
U.S. crude closed up 72 cents, or 1.6 percent, at $46.26 a barrel. Brent rose $1.20, or 2.4 percent, to $49.95 a barrel.
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Gasoline surged about 3 percent, helping drive up prices for both crude and other refined fuels.
"Fuel products are leading the way today though they also seem to be deriving their strength from the broader risk appetite contributed by the equities rally," said Pete Donovan, broker at Liquidity Energy in New York.
Russia, one of the world's top three oil producers, said it was prepared to meet OPEC and non-OPEC oil producers to discuss the market if such a meeting is called. A separate meeting between Russian and Saudi officials was being planned for the end of October, Russian Energy Minister Alexander Novak has said.
Moscow had been unwilling in the past to cut its oil output to support prices. Last November, it declined to cooperate with the Organization of the Petroleum Exporting Countries to defend market share.
Russian oil output hit a new post-Soviet monthly high of 10.74 million barrels per day in September, despite a drop in global crude prices to 6½-year lows in August.
Despite Monday's rally, some analysts braced for renewed pressure on oil prices from U.S. government data this week that could show further builds in crude inventories.
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Market intelligence firm Genscape reported a modest drop about 150,000 barrels on the week for inventories at the Cushing, Oklahoma storage hub for U.S. crude, traders who saw the data said.
That sparked concern among some that there would be builds instead of draws in Cushing when the U.S. Energy Information Administration reports weekly storage data on Wednesday.
The EIA said U.S. oil stockpiles in total rose nearly 4 million barrels the week ending Sept. 25.
"We still are bearish on oil given the excess in the market, and the time required to clear all the excess crude and oil products supply," Abhishek Deshpande, London-based analyst for French bank Natixis, told the Reuters Global Oil Forum.