The U.S. dollar has retreated from Monday's peak as investors look ahead to jobs data this week that Federal Reserve Vice Chair Stanley Fischer has said will be important to whether the U.S. central bank raises interest rates soon, according to Reuters.
A weaker dollar makes oil purchases cheaper for buyers using other currencies, potentially spurring demand.
Yet doubts of agreement in talks on an output freeze among members of the Organization of the Petroleum Exporting Countries (OPEC) continues to weigh on prices, Reuters wrote.
"There's a feeling that the OPEC production freeze talks might result in something positive, but it's just talk," said Robert Nunan, risk management director at Mitsubishi Corporation, according to the report.
Brent crude futures LCOc1 were trading at $49.38 per barrel at 0505 GMT, up 12 cents from their previous close.
U.S. West Texas Intermediate (WTI) crude was up 17 cents at $47.15 a barrel.
Saudi Arabian Energy Minister Khalid Al-Falih told Reuters last week he does not believe an intervention in oil markets is necessary since the "market is moving in the right direction".
