* Rising U.S. crude, fuel stocks weigh
* Weak euro pressures oil prices
* Concern Greek crisis could spread to Portugal, Spain
* Coming Up: U.S. EIA weekly oil stocks data
(Updates prices, recasts, adds detail, previous SINGAPORE)
By David Sheppard
LONDON, May 5 (Reuters) - Oil slipped further to $82 a barrel on Wednesday, extending the steepest one-day loss in three months as the unfolding crisis in Greece rattled markets and mounting U.S. crude oil inventories pointed to soft demand.
Rising concerns Greece's debts crisis could spillover into other euro zone countries and derail the global recovery have seen oil futures shed almost a quarter of the last three months' gains since hitting a 19-month peak above $87 on Monday.
"Commodities got thrashed on Tuesday, and even energy, which has been holding up relatively well over the last few days on account of the Gulf oil spill, lost the largest amount of ground in over three months," MF Global analyst Edward Meir said.
"None of the commodity complexes could withstand the withering rally we saw in the dollar/euro market, where the greenback soared to break below the $1.30 mark against the euro to stage one of its sharpest rallies in some time."
Dollar-priced commodities like oil are pressured by strength in the greenback as they become more expensive for holders of other currencies. Rising risk aversion is also a factor as investors pull money out of volatile assets like oil. [
]On Wednesday, Finland's finance minister said there is a risk Greece's financial problems could spread to Spain or Portugal, while a senior member of Germany's ruling part said concerns remain an international aid package for Greece could fail. [
] [ ]U.S. crude for June delivery <CLc1> was down 64 cents at $82.10 a barrel by 0806 GMT. London Brent crude <LCOc1> lost 61 cents to $85.06 a barrel
U.S. crude dropped $3.45, or 4 percent, on Tuesday to settle at $82.74 a barrel. In post-settlement electronic trading, it ended at $82.07, down $4.15 or 4.78 percent, the largest one-day percentage loss since the 4.99 percent slide on Feb. 4. <^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ For a graphic on dollar/oil correlation, click http://graphics.thomsonreuters.com/gfx/RSW_20100405150342.jpg For a technical chart, click: http://graphics.thomsonreuters.com/gfx/WT_20100505084256.jpg ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^>
DEMAND WEAKNESS
"The main influences now are the rise in the dollar, the sovereign concerns in the euro zone spreading into Portugal and Spain. I think a pretty important factor though going forward is the build in oil stocks in the United States," said Ben Westmore, an analyst at National Australia Bank.
Crude oil inventories in the world's largest energy consumer rose by 3 million barrels in the week to April 30, the American Petroleum Institute said on Tuesday. Analysts polled by Reuters had predicted a 1.1 million barrel rise.
Gasoline stocks also rose, climbing by 1.5 million barrels against analyst expectations for a 200,000 barrel build.
Figures from the U.S. government's Energy Information Administration are due at 1430 GMT on Wednesday.
U.S. demand for gasoline at the pumps, which makes up more than 10 percent of total world oil demand, was down 2.3 percent on last year in the week to April 30, the Mastercard SpendingPulse report showed on Tuesday.
Teams of oil spill workers were set to take to advantage of at least one more day of calm in the Gulf of Mexico on Wednesday to keep fighting to contain a huge and growing slick before winds turn against them. [
]Crude oil prices have not been seriously affected from the oil spill after a deadly April 20 rig explosion triggered a breach in BP's <BP.L> well.
(Additional reporting by Judy Hua in Singapore; editing by William Hardy)