* U.S. December durable goods orders likely to be weak
* Q4 GDP data to show economy at its weakest in 26 years
* Deeper U.S. refinery run cuts may offer support (Adds analyst quotes, Nippon Oil, updates prices)
By Jennifer Tan
SINGAPORE, Jan 29 (Reuters) - Oil slid below $42 a barrel on Thursday, as fears over faltering demand in the global economy outweighed U.S. data showing falling gasoline and distillate stocks in the world's top energy consumer.
Traders will watch for weekly jobless claims and December durable goods orders later on Thursday, as well as advance fourth-quarter gross domestic product data on Friday, for further clues on the health of the U.S. economy.
U.S. crude <CLc1> fell 53 cents a barrel to $41.63 by 0627 GMT, while London Brent crude <LCOc1> lost 68 cents to $44.22.
Crude prices plunged 9 percent earlier this week on fresh signs that the United States was still deeply mired in recession.
"The market is going to drift lower in the days ahead -- we will probably test the lows of between $35 and $39, but it should not go much lower than that -- the bottom is being put in," said Mark Waggoner, president of Excel Futures in California.
Oil prices rebounded on Wednesday after data released by the U.S. Energy Information Administration showed a 1 million-barrel draw in distillate stocks last week as cold weather hit the U.S. Northeast, the world's top heating oil market, and a surprise 100,000-barrel fall in gasoline supplies. [
]Crude also got a boost from remarks by OPEC Secretary General Abdullah al-Badri at the World Economic Forum in Davos, Switzerland, that an oil price of $50 a barrel was too low to encourage investment in new supply and the cartel would fully enforce supply curbs by the end of this month. [
]But jitters over the data release later in the day, likely to give a grim reading of the U.S. economy, weighed on market sentiment and sparked an early bout of selling.
Durable goods orders, due at 1330 GMT, are estimated to have fallen 2.0 percent in December after a 1.5 percent decline in November, economists polled by Reuters said.
U.S. weekly jobless count is expected to show that 580,000 people filed new claims for state unemployment insurance in the week ended Saturday, following a week with 589,000 new claims.
All eyes will be trained on the government's first snapshot of the U.S. economy in the fourth quarter, due on Friday, which will show it at its weakest in 26 years, hit by plunging consumer spending and surging unemployment rates. [
]RUN CUTS
The dismal forecast comes atop the International Monetary Fund's forecast on Wednesday that world economic growth this year will fall to its slowest since World War Two. [
]In Asia, Japan's Nippon Oil Corp <5001.T> said it expected February crude refining volumes to fall 12 percent from a year ago as domestic demand declines. [
]"There remains, we think, a high probability of another material downturn in oil prices once seasonal demand begins to ebb," said UBS Investment Research economist Jan Stuart.
On the supply front, price support for oil is likely to come from expanding U.S. refinery run cuts, which will reduce fuel supply, analysts said.
U.S. refiners are likely to take more processing units down for longer periods during spring maintenance as prolonged economic weakness crimps demand for fuel.
"Crude stockpiles will continue to build, but distillates and gasoline will leave the market this year as refineries remain down for longer periods -- prices will start going higher, and will eventually lead the market higher as we get into the summer," Waggoner said.
OPEC's supply cuts since second-half 2008, in reaction to the fall of more than $100 in oil prices since July, have also offered a boost.
Kuwait said on Tuesday it would support a further production cut if needed, echoing comments by some other OPEC members, while smallest member Ecuador said it would comply with the production cuts agreed by the cartel. [
] [ ]OPEC next meets on March 15 to decide output policy.
Martin King, analyst with FirstEnergy Capital Corp, believes OPEC has done a much better job of cutting supplies from the market than many have expected, setting the stage for a gradual price rebound in the second half of 2009.
"We see the crude market on the cusp of achieving real signs of stability, driven in part by tighter supplies out of OPEC." (Editing by Ramthan Hussain) (jennifer.tan@thomsonreuters.com; +65-6417 4679; Reuters Messaging: jennifer.tan.reuters.com@reuters.net)