But analysts said the rebound would not likely last owing to a painful supply glut and weak demand caused by the slowing world economy.
At around 0430 GMT today, US benchmark West Texas Intermediate for delivery in May was up 97 cents, or 2.70 per cent, at USD 36.86 and Brent crude for June was 68 cents, or 1.80 per cent, higher at USD 38.55.
Both contracts eked out an increase yesterday, but prices are still well below the USD 40 level reached last month following a rally driven by hopes of an agreement during the April 17 producers' meeting in Doha.
But Iran, which has been raising production since the West lifted nuclear-linked sanctions in January, has insisted it should not be the one to cut back.
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Key OPEC member Kuwait, however, said a freeze deal can still be reached without Tehran, Bloomberg News reported.
It quoted Kuwait's OPEC governor Nawal al-Fezaia as saying that major producers have no option but to reach an agreement and that a freeze could set a floor price.
"Given the welter of statements... People are probably just going to ignore (the comments) until they get the results of the meeting," Spooner told AFP by telephone.
Comments by International Monetary Fund chief Christine Lagarde that global economic recovery is still "too slow" and "too fragile" further added to the gloom in the saturated oil market as it is bad news for demand, analysts said.