Prices rose ahead of an emergency summit on Greece by eurozone leaders in Brussels today, after Greek citizens overwhelmingly rejected creditors' demands for further belt-tightening in a referendum.
US benchmark West Texas Intermediate for August delivery advanced 47 cents to USD 53.00 in late-morning Asian trade after plummeting nearly 8.0 per cent, or USD 4.43, in US closing deals yesterday.
Brent crude for August gained 69 cents to USD 57.23 after retreating more than 6.0 per cent, or USD 3.78, in London.
"I'm really looking at this whole issue as panic selling because of the Greece issue. I think the market expected the drops but not to this extent," he told AFP, referring to Monday's price fall.
Analysts say one of the results of the Greece referendum could be an exit from the eurozone currency union, which could trigger a contagion effect.
With the country's economy gasping for air, authorities there extended an eight-day bank closure until Thursday amid fears cash machines in the country were running dry.
