US benchmark West Texas Intermediate for delivery in November fell 44 cents to USD 46.66 a barrel on the New York Mercantile Exchange.
Brent North Sea crude for delivery in November, the global benchmark, finished at USD 49.24 a barrel in London, down 62 cents from yesterday's settlement.
Both futures contracts had plummeted more than five percent yesterday, partly on worries about excessive supply and profit taking after Friday's powerful rally.
"It's a continuation of what I thought was a bearish technical day yesterday," said Kyle Cooper of IAF Advisors.
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The growth estimate, lower than the previous month, underscored "the risk of an ongoing physical surplus at least through the end of 2016," said Tim Evans of Citi Futures.
The oil market also was weighing the latest trade data from China. Imports plunged by 20.4 percent in September as growth in the world's second-largest economy slows.
But Chinese crude oil import volumes were still 8.8 per cent higher over the first nine months of the year than a year ago.