* Prices buoyed by weaker dollar and signs of U.S. recovery
* Supported by stronger Asian shares after U.S. jobs data
* Money managers increase net NYMEX crude longs-CFTC
* Coming up: Euro zone March sentix index; 0930 GMT (Recasts; updates prices)
By Osamu Tsukimori
TOKYO, March 8 (Reuters) - Crude oil extended gains to an eight-week high above $82 a barrel on Monday, buoyed by a weaker dollar and signs of an economic recovery in top oil consumer, the United States.
Traders and analysts say currency movements could dominate oil prices as demand strength stays unclear during the recovery.
The euro <EUR=> rose 0.4 percent to $1.3675, helped at the margins by growing support for debt-laden Greece. The dollar index <.DXY>, which measures the greenback against a basket of currencies, edged down 0.32 percent.
French President Nicolas Sarkozy promised Greece on Sunday that euro-zone countries would help it overcome its financial problems and vowed a crackdown on financial speculators who Athens blames for its woes. [
]Crude for April delivery <CLc1> was up 83 cents at $82.33 a barrel by 0748 GMT, after touching $82.41 earlier, the highest since $83.95 marked on Jan. 11.
London Brent crude <LCOc1> was up 86 cents at $80.75 after hitting $80.78 earlier, the highest since Jan. 12.
New York crude has traded in a range of $69 to $84 over the past few months amid uncertainty about the speed of the global economic recovery.
"In the past few days, market moves have been led by technicals," said Tomokazu Amano, analyst at Mitsubishi Corp Futures & Securities in Tokyo.
"Now that $80 or higher is here to stay, we are seeing an influx of speculative money from funds and others."
Money managers extended their net long crude oil futures positions on the New York Mercantile Exchange in the week to March 2, the Commodity Futures Trading Commission said on Friday. [
]The key speculator group hiked net long positions to 144,058 during the week, up from 132,504 in the week to Feb. 23.
Oil also got support from higher Asian shares, which tracked a rally in the U.S. markets to an 18-month closing high on Friday. Japan's Nikkei average and South Korean shares closed up more than 1.5 percent.
"The strength in Asian shares was providing support, but it's difficult to grasp the market's direction," said Ken Hasegawa, a commodity derivatives sales manager at broker Newedge in Tokyo.
"Although the market hit $82 today helped by the U.S. jobs report, it's difficult to buy further."
CHINA DEMAND
Oil also got support after news that China, the world's second-biggest oil consumer, will build two strategic oil reserve bases in Guangdong province, at Huizhou and Zhanjiang. [
]Chinese oil demand is likely to see a further boost in the next few years as the country seeks crude to stash in its state oil reserves, which it plans to expand rapidly in the coming decade.
China's crude oil output will rise by 1-2 percent this year, and state-owned China National Petroleum Corp (CNPC) group will refine 11.4 percent more crude oil in 2010, a CNPC executive said on Sunday. [
]With oil prices within a "comfort zone" of $70-80 per barrel and demand expected to revive, the Organisation of Petroleum Exporting Countries (OPEC) looks set to keep its production target unchanged on March 17, as it has done for more than a year. [
]Oil producers are pumping more crude than consumers need but the oversupply is insufficient to have a big impact on the market, Iran's OPEC governor said on Sunday. [
]Oil market participants were also paying attention to the election in Iraq. Bomb blasts and rocket and mortar fire killed 38 people as Iraqis voted on Sunday in an election they hoped would distance their nascent democracy from years of sectarian slaughter as U.S. troops pack up to leave. [
] (Editing by Himani Sarkar)