* Further builds in U.S. crude stocks weigh on prices
* Q4 GDP data to show economy at its weakest in 26 years
(Updates throughout, previous SINGAPORE)
By Joe Brock
LONDON, Jan 29 (Reuters) - Oil dropped below $42 a barrel on Thursday, as data showing a further build in crude stocks in the United States heightened expectations of falling demand for oil from the world's largest fuel consumer.
The market 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 35 cents a barrel to $41.81 by 0930 GMT, while London Brent crude <LCOc1> lost 6 cents to $44.84.
"U.S. crude has weakened again. The 300,000 barrel stock build in Cushing and the general crude stock build has caused this," said Christopher Bellew, a broker at Bache Commodities in London. U.S. crude oil inventories jumped last week for the fifth week in a row amid lower demand from domestic refiners curbing operations for first-quarter maintenance programs or for economic reasons, government data on Wednesday showed. [
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MORE GRIM DATA
Expectations that data to be released later in the day is 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 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. [
]Remarks by OPEC Secretary General Abdullah al-Badri at the World Economic Forum in Davos, Switzerland that OPEC would not hesitate to act again if oil price remains low offered support to crude prices. [
]OPEC's output cuts since second-half 2008, in reaction to the fall of more than $100 in oil prices since July, have also helped to put a floor under prices.
Badri said on Wednesday OPEC is expected to have fully delivered on its pledged supply curbs by the end of this month, but a weak economy would continue to erode demand for fuel.
OPEC next meets on March 15 to decide output policy.
Martin King, analyst with FirstEnergy Capital Corp, said OPEC had done a much better job of cutting supplies from the market than many had 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." (Additional reporting by Farah Master in London and Jennifer Tan in Singapore; editing by James Jukwey) (joe.brock@thomsonreuters.com; +44(0)542 9162; Reuters Messaging: joe.brock.reuters.com@reuters.net)