LONDON (Reuters) - Oil fell below $45 a barrel on Friday, after the collapse of a $14 billion rescue for U.S. automakers caused heavy losses across global financial markets and Goldman Sachs predicted oil could fall to $30 a barrel.
U.S. crude oil for January delivery was down $3.17 at $44.81 a barrel by 1253 GMT (7:53 a.m. EST).
Prices rallied more than $4 on Thursday to a session high of $49.12 a barrel before dropping back in late trading.
Oil sank to $40.50 last Friday, its lowest in 4 years.
London Brent crude was down $3.10 at $44.29.
The plight of the big U.S. auto firms, including General Motors Corp and Chrysler, illustrates the severity of the global economic downturn that has hit demand for oil.
"The collapse in world oil demand in the fourth quarter of 2008 as the global credit crunch intensified, now threatens to push oil prices below $40 a barrel in the near term," Goldman Sachs said in a research note.
"The impact of the global economic recession has swung the oil market from pricing demand destruction in 2008 to pricing supply destruction in 2009."
The U.S. bank, which earlier this year had predicted $200 per barrel oil, virtually halved its 2009 price forecast for U.S. crude to $45 and said the price could fall to $30 in the short term.
Goldman analyst Arjun Murti, who predicted a super-spike in oil to $100 in 2005, said prices would hit a trough in the first quarter.
The bank said a cut of an extra 2 million barrels per day was needed from OPEC, which meets next on December 17 in Algeria.
French bank BNP Paribas cut its 2009 price forecast to $53 a barrel from $75 previously.
Crude has shed two-thirds of its value over the last five months, down about $100 from a record of $147.27 in July.
It rebounded more than 10 percent on Thursday in anticipation of a big supply cut from the Organization of the Petroleum Exporting Countries.
OPEC's President Chakib Khelil has called for more "severe" supply cuts at next week's meeting.
