SINGAPORE Oil prices eased on Friday, as a hurricane subsided in the Gulf of Mexico, though prices held near the previous day's record high on supply worries ahead of peak winter demand.
U.S. crude for October dropped 38 cents to $79.71 a barrel by 0728 GMT (8:28 a.m. British time), having settled up 18 cents in New York on Thursday, when prices hit a record of $80.20 a barrel. London Brent crude for November shed 22 cents to $76.90.
U.S. gasoline futures eased 0.4 percent after leading gains on Thursday, as Hurricane Humberto was downgraded to a tropical storm after shutting oil shipping channels and three refineries when it slammed onshore in Texas.
Valero (VLO.N) said it expected to restart its Port Arthur, Texas plant by Sunday, after the U.S. refiner, Total (TOTF.PA), and Shell (RDSa.L) shut the plants when a power failure cut electricity.
Oil prices are still up 31 percent this year and traders are looking to the next Gulf of Mexico storm, Tropical Storm Ingrid, which formed late on Thursday and was headed for the northeastern Caribbean but was days from hitting land.
"Mounting evidence that the global oil market is tightening fast has made markets increasingly concerned over future supply availability as we head into the winter season," said Barclays Capital.
Lower refinery supplies coincided with the start of winter stockpiling for heating fuel in the western hemisphere. U.S. heating oil stocks rose last week but remained about 30 percent down on last year.
Supplies of crude in the United States fell last week to the lowest level in eight months, while gasoline stocks slid to their lowest in two years.
To try to placate consumers, the Organization of the Petroleum Exporting Countries agreed a small supply increase on Tuesday. But analysts said OPEC's deal to raise output by 500,000 barrels per day (bpd) from November 1 was not enough to reverse oil's rally.
"Despite OPEC's decision to raise crude output, the market is concerned," said John Waterlow, an analyst from Wood Mackenzie.
Robust economic growth in the world's second-largest oil consumer, China, continued to bolster energy consumption, evident in higher refinery usage, which rose 7.8 percent last month versus a year ago, government data showed on Thursday.
Though oil prices have quadrupled since 2002, when adjusted for inflation the price is below the $90-a-barrel peaks of the Iranian Revolution in 1979 and the start of the Iran-Iraq War the following year.
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