Oil Falls as Output Freeze Doubts Linger

OPEC output rising ahead of April 17 meeting in Doha; Saudis to freeze output only if others do.

Oil futures fell below $40 per barrel on Friday, with the market growing increasingly sceptical that a looming deal to freeze crude production can help clear a global glut.

Saudi Arabia will freeze its oil output only if Iran and other major producers do so, Saudi Deputy Crown Prince Mohammed bin Salman told Bloomberg in an interview, helping push prices lower.

Brent crude for June delivery fell 90 cents to $39.43 a barrel as of 1108 GMT. Brent rose 6 percent in the first quarter of this year, its first such increase since a 15 percent rally in the second quarter of 2015.

U.S. crude fell 88 cents to $37.46 a barrel. Prices rose almost 4 percent over January-March, also the first quarterly gain since surging nearly 25 percent in the second quarter of last year.

Prices have recently pulled back on low trading volumes and concerns about oversupply ahead of an oil producers' meeting in Doha to agree a possible output freeze on April 17.

"Hopes have been running high about the potential bullish impact of the planned OPEC/non-OPEC production freeze but it is hard to see how sticking to the January output level would be supportive for oil prices," PVM Oil Associates analyst Tamas Varga said.

"There will be no re-balancing this year."

A Reuters monthly survey showed this week that OPEC output rose in March on higher supply from Iran after the lifting of sanctions and near-record exports from southern Iraq.

Oil prices fell despite a lower dollar and China's official Purchasing Managers' Index (PMI) showing an unexpected expansion in March, the first in nine months.

Putting a floor under prices was a drop in U.S. crude output, falling for a fourth straight month in January to the lowest since October 2014.

Later on Friday, the market will be watching for U.S. non-farm payroll data to give oil prices further direction.

Reporting by Dmitry Zhdannikov