(Recasts with U.S. inventory data, updates prices)
By Jane Merriman
LONDON, Feb 21 (Reuters) - Oil fell back on Thursday from all-time highs above $100 a barrel, pressured partly by a bigger-than-expected rise in crude oil stocks last week in top energy consumer the United States.
But the market remains supported by a tide of investor cash, which helped drive oil to a new record on Wednesday.
U.S. crude oil inventories rose a surprise 4.2 million barrels last week, a government report said, more than the 2.3 million increase forecast by analysts. [
]Oil has averaged $93.02 a barrel this year, up nearly a third on the average in 2007 of $72.30.
U.S. crude for April delivery <CLc1> was down 20 cents at $99.50 a barrel by 1612 GMT.
The March contract, which expired on Wednesday, hit a record of $101.32, before closing at $100.74 a barrel.
Oil's latest spurt has taken it close to its all-time inflation-adjusted high of $102.53 hit in April 1980, a year after the Iranian revolution.
London Brent <LCOc1> was down 32 cents at $98.10 a barrel.
"Overall, the (U.S. inventory) numbers have a bearish tilt," said Chris Jarvis, senior analyst at Caprock Risk Management.
He said the bigger-than-expected build in crude oil stocks increased the emphasis on a possible OPEC production cut at the group's March meeting.
"Without production cuts, we believe the current oil price is not sustainable over the near-term given the fundamental picture today," Jarvis said.
Gasoline stocks rose by 1.1 million barrels, in line with forecasts. Distillates fell by 4.5 million barrels, more than the predicted 1.7 million barrel decrease.
Analysts have pointed to rising U.S. crude oil stocks as evidence that market's supply/demand balance is not constrained.
Members of the Organization of the Petroleum Exporting Countries have repeatedly said there is no need for more oil.
"We will not just react to $100 oil," Qatar Oil Minister Abdullah al-Attiyah told Reuters. Qatar sees demand for oil falling seasonally in the second quarter as the winter ends and customers are requesting less oil in March, not more, he said.
But the International Energy Agency, which advises industrialised countries on energy matters, has urged OPEC to, at the very least, keep oil production levels unchanged, to rebuild low crude stocks.
Economic data on the United States have painted a gloomy picture for oil demand in the world's top energy consumer, but investors' focus has shifted for now to the inflation outlook.
The U.S. Consumer Price Index, for example, rose faster than expected in January and for the second straight month.
Funds have piled into oil and commodities to protect their returns against inflation and because of the weak dollar.
Gold, copper and soybeans, for example, have all touched record highs.
"The current run could continue for a little while longer given the general infatuation with commodities," said Edward Meir, analyst at broker MF Global. (Additional reporting by Chua Baizhen, editing by Anthony Barker)