* Oil rises, dollar seesaws after Fed stimulus plans
* Fed to buy $75 bln/month in long-term Treasuries
* Total Fed bond purchases seen at $600 billion
* U.S. fuel stocks fell last week, crude up-EIA (Recasts, adding details and prices throughout)
By Joshua Schneyer
NEW YORK, Nov 3 (Reuters) - Oil prices extended gains but failed to surpass an early six-month high on Wednesday after the Federal Reserve's much-anticipated plan to inject fresh economic stimulus fell well within expectations.
Oil prices and other markets vascilated modestly after the Fed said it would buy around $75 billion in Treasury bonds per month through mid-2011, totalling around $600 billion. The U.S. dollar weakened against a basket of currencies <.DXY>. To read the full Fed story please click [
]Oil had gained earlier after weekly data on Wednesday showed U.S. stocks of gasoline and distillate fuels fell more sharply than expected last week as the country's refineries cut utilization rates to the lowest since March.
While the fresh infusion of cash was expected to weaken the dollar and lift commodities over the long-term, analysts said the short-term effect had already been factored in.
"I think the market is showing that a lot of this has been priced in and that is why we haven't shot a lot higher," said Gene McGillian of Tradition Energy in Connecticut.
"But the fact (Fed) is going to be doing this much will provide some support for the market -- at least until Friday's unemployment report.
U.S. crude for December delivery <CLc1> rose $1.04 to $84.94 a barrel by 3:04 p.m. EDT, after rising to a six-month high of $85.36 earlier Wednesday. ICE December Brent <LCOZ0> was at $86.63, up $1.22.
The Fed's plans are in line with economist expectations but a bit less aggressive than some polled by Reuters had expected. Estimates for how much the Fed would spend on asset purchases overall varied from $250 billion to $2 trillion.
A weaker dollar can make commodities -- mostly priced in dollars -- more attractive to investors. Fed easing may cheapen borrowing costs, potentially expanding the pool of dollars flowing into commodities markets.
U.S. FUEL INVENTORIES FALL, ECONOMIC DATA IMPROVE
U.S. crude stockpiles rose by 2 million barrels last week, roughly in line with analyst expectations. But distillate stocks shrank by 3.6 million barrels and gasoline stocks fell by 2.7 million barrels, whittling down overall U.S. fuel stocks by more than expected last week, as U.S. refinery utilization fell to 81.8 percent, the lowest rate since March.
(Graphic: http://link.reuters.com/man63q )
The U.S. services sector grew more quickly than expected in October and factory orders posted their largest gain in eight months. Also, a private report showed U.S. private employers added more jobs than expected in October.
(Additional reporting by Gene Ramos, Robert Gibbons, Eileen Moustakis and Edward McAllister in New York, Zaida Espana in London, and Alejandro Barbajosa in Singapore; Editing by David Gregorio)