OIL fell on Monday as weak economic data from China, the world's largest energy consumer, weighed on prices and an Opec source played down talk of an emergency meeting to stem the decline.

China's manufacturing sector contracted at the fastest pace since 2012 in January, adding to worries about demand from the world's second-biggest economy at a time when the market is already weighed down by a large supply overhang.

‘The weak China PMI (purchasing managers' index) is driving down prices because China weighs on the entire commodities sector from the demand side of the equation," said Carsten Fritsch, senior oil analyst at Commerzbank in Frankfurt.

Brent April crude futures LCOcl were down 35 cents at $35.64 a barrel at 5.23 am ET. The March Brent contract, which expired on Friday, settled at $34.74 a barrel.

US West Texas Intermediate (WTI) CLcl was down 57 cents at $33.05 a barrel. A senior Opec source told a Saudi Arabian newspaper it was too early to talk about an emergency meeting of the Organisation of the Petroleum Exporting Countries.

Oil prices jumped last week after Russian energy officials said they had received proposals from Opec lynchpin Saudi Arabia on managing output and were ready to talk.

"We do not expea such a cut will occur unless global growth weakens sharply from current levels, which is not our economists' forecast,” investment bank Goldman Sachs said in a report.

Opec member Iran, which last month was allowed to return fully to markets after years of sanctions, is so far unwilling to participate in cuts.