US benchmark West Texas Intermediate eased 44 cents to USD 47.01 while Brent fell 30 cents to USD 55.62 in late-morning trade.

"Prices coming off slightly today may have to do with the weak flash manufacturing data coming out of China," Nicholas Teo, market analyst at CMC Markets in Singapore, told media.
HSBC's preliminary purchasing managers index of China's manufacturing sector dipped to a 11-month low of 49.2 in March, down from 50.7 in February, data released early on Tuesday showed.
The figure -- a key indicator of the health of the Asian economic giant -- missed the median estimate of a rise to 50.5 in a survey. A reading above 50 indicates growth.
Teo said dealers will be next be focusing on a slew of US data, including on weekly crude stockpiles, oil rig count as well as the final reading on fourth-quarter gross domestic product growth on Friday.

"The GDP figures will be closely watched by the market as investors try to make sense of somewhat conflicting data, with a pick-up in US unemployment and unflattering retail sales data," Teo said.
Adding to price pressures, Saudi Arabia oil minister Ali al-Naimi on Sunday cited a recent increase in production, showing the OPEC kingpin remains committed to competing for market share.
A news channel has reported that the kingdom is currently pumping almost 10 million barrels of crude a day, compared with 9.85 million in February.

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