Oil slips

World oil prices retreated Tuesday on profit-taking, after recent gains that were underpinned by positive manufacturing data in China and the United States, analysts said.
New York's main contract, light sweet crude for December delivery, dipped 75 cents to 77.38 dollars a barrel.
Brent North Sea crude for December delivery shed 71 cents to 75.84 dollars per barrel.
Oil had rebounded on Monday, buoyed by a weaker dollar and positive US and Chinese economic data that bolstered hopes of stronger demand in the two biggest energy-consuming nations.