* U.S. crude inventories up for 11th straight week - poll
* Average demand in 2010 to hit record 86.6 million bpd-IEA
* Chinese GDP may provide support for prices
* Coming Up: API data 2030 GMT
(Updates throughout, changes dateline from SINGAPORE)
By David Sheppard
LONDON, April 13 (Reuters) - Oil fell for a fifth straight session to below $84 on Tuesday, almost erasing April's gains, as a forecast increase in U.S. crude stocks highlighted rising supplies and weak demand in the world's largest energy consumer.
But prices were supported by the latest forecast from the International Energy Agency (IEA) that predicts world demand will rebound this year to hit its highest ever average level.
U.S. crude oil for May delivery <CLc1> slid 80 cents to $83.54 a barrel by 0905 GMT, down 4 percent from an 18-month high of $87.09 hit last week.
Brent crude oil, the benchmark for the Atlantic basin and most of Europe, Africa and Asia, held the premium gained over U.S. crude on Monday for the first time this year, but dipped by 46 cents to $84.31 a barrel.
"The market is turning back into consolidation mode," said Stefan Graber, a commodities analyst with Credit Suisse in Singapore.
"There have been fundamental improvements, but the last two weeks have not really shown that much improvement to warrant the strong move higher. There is not a lot of fresh impulse to push prices further." ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ For a technical analysis of the crude oil price, click [
] For a graphic of oil's technical outlook, see: http://graphics.thomsonreuters.com/gfx/WT_20101304102725.jpg For a FACTBOX on why WTI is trading below Brent, click: [ ] ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^U.S. crude inventories probably rose for the 11th straight week, a Reuters survey showed ahead of an industry report later on Tuesday, climbing by 1.6 million barrels in the seven days to April 9. Supplies of distillates, including heating oil and diesel are predicted to have climbed 1 million barrels, though gasoline stocks were expected to have fallen by 700,000 barrels.
2010 OIL DEMAND HIGHEST EVER
While crude oil stockpiles have been mounting in the United States, average global oil demand is still expected to rebound this year after falling since its previous high in 2007.
The IEA said on Tuesday average global oil demand will hit a record high of 86.6 million barrels per day (bpd) in 2010, as rapid growth of 1.67 million bpd wipes out two years of falling consumption caused by higher prices and the economic crisis.
The Paris-based adviser to 28-industrialised nations raised its demand forecast by 100,000 bpd from its previous estimate, though high stock levels and rising output from OPEC members and other countries is expected to keep the market relatively well balanced in the coming months. [
]The agency's monthly oil market report details the shifting balance in world oil consumption between the developed world and emerging nations.
While members of the Organisation for Economic Co-operation and Development (OECD) have seen their total oil consumption fall by 5.1 million bpd since 2006 to 45.4 million bpd, rapid growth in nations like China and India has seen non-OECD demand soar by 5.5 million bpd to 41.2 million bpd over the same period.
A Reuters survey ahead of China's publication of its latest GDP data on Thursday showed the Asian powerhouse's economy probably grew 11.5 percent in the first quarter. That would be the fastest year-on-year growth since the third quarter of 2007. [
](Additional reporting by Alejandro Barbajosa and Wang Tao in Singapore; Editing by Amanda Cooper)