Oil prices fell toward $73 per barrel, heading for a third consecutive week of losses.
US oil for March delivery fell 27 cents to $73.37 a barrel, down more than 10% from a 15-month high of just under $84 on 11 January.
In London, ICE Brent crude for March fell 30 cents to $71.83 a barrel.
The US economy grew a faster-than-expected 5.7% in the fourth quarter of 2009, the quickest pace in more than six years, as businesses reduced inventories less aggressively.
But the positive economic signals came amid reports showing tepid demand in Japan and the United States, rising US fuel stockpiles and expectations that OPEC producers will boost exports.
US oil demand shrank 2% in the past four weeks from a year earlier, while Japanese data showed crude imports fell 2.6% in December and gasoline sales tumbled 2.4%.
China's moves to rein in credit also raised concerns about the pace of economic growth and oil demand.
