U.S. Energy Secretary Sam Bodman said on Tuesday the United States was not concerned about the debate within OPEC on whether it should seek an alternative to the dollar in pricing oil.
OPEC states agreed their finance ministers would meet before Dec. 5 to discuss the sliding dollar's impact on their economies after Iran and Venezuela recommended pricing oil against a currency basket.
Saudi Arabia, the world's top oil exporter, said on Sunday that it was premature to talk about an OPEC increase in oil output but group members would discuss the issue at an upcoming meeting.
OPEC raised oil production last month in response to record-high prices above $90 a barrel and in advance of a formal deal to lift supply, a Reuters survey showed on Friday.
OPEC Secretary-General Abdullah al-Badri said on Wednesday the group was implementing a decision taken in September to increase production by 500,000 barrels per day (bpd).
OPEC is already raising oil supply in response to record prices and in advance of its deal to increase output from November, a consultant who tracks tanker movements said on Tuesday.
OPEC has done its utmost to satisfy the world's demand for fuel and pumping even more crude will do little to halt oil's rally towards $88 a barrel, officials said on Tuesday.
OPEC on Monday raised its forecast for demand for its oil this winter and said it appeared more likely that top consumer the United States would avoid a steep economic slowdown.
More crude supply from OPEC would do little to ease $80 oil as speculative investment flowing into the market from other assets is boosting the price, Qatar's oil minister said on Monday.
Oil prices, which briefly dropped below $79 per barrel on Wednesday, jumped back up late in the afternoon to close over $80, as traders weighed a U.S. government report showing a surprise increase in the nation's crude inventories against concerns that a new storm could be brewing in the Gulf of Mexico, threatening production.