* U.S. Federal Reserve meets, expected to keep rates low
* Global and U.S. equities up, support oil
* Coming up: Fed meeting results, Tuesday 2:15 p.m. EDT (Recasts, updates prices, market activity, changes byline and moves dateline from previous LONDON)
By Robert Gibbons
NEW YORK, Aug 9 (Reuters) - Oil rose for the first time in four sessions on Monday, edging back above $81 a barrel on expectations that the U.S. Federal Reserve may signal its readiness to print more money to support a faltering economic recovery.
Oil's gains were choppy with traders torn between a slightly stronger stock market and the U.S. dollar, which edged up after falling to a three-month low versus the euro on Friday, was making crude oil a more attractive investment.
U.S. crude for September <CLc1> delivery rose 31 cents to $81.01 a barrel at 1:25 p.m EDT (1725 GMT), having traded from $80.71 to $81.76. Front-month ICE Brent crude <LCOc1> rose 32 cents to $80.48 a barrel.
Oil prices have faded from last week's high of nearly $83 a barrel, dropping 1.6 percent on Friday in the wake of a disappointing U.S. nonfarm payrolls report. [
]"Weaker longs bailed out after the disappointing jobs data Friday. Now the expectation is the Fed will keep interest rates low and keep money flowing into the the stock market and commodities," said Gene McGillian, analyst at Tradition Energy in Stamford, Connecticut.
The Fed is widely expected to renew its commitment to keep interest rates near zero for an extended period at Tuesday's meeting. But traders also are watching closely to see if officials are more concerned about the economic recovery or about the danger of falling into a vicious cycle of falling prices and slowing growth. [
]The dollar edged higher against major currencies, coming off Friday's lows, as wary investors eased positions before the Fed's monetary policy announcement. [
]The desire to wait for the Federal Reserve's announcement and the normal slumber during the August peak vacation period have lowered trading volume, industry sources said.
With an hour to go in the open outcry session in New York, trading volume for U.S. crude was low, traders said, with a total 322,143 lots transacted, according to Reuters data. The 30-day average is 530,876 lots traded per day.
GEOPOLITICAL RISK PREMIUM
Geopolitical tensions and the risk of an incident between the West and Iran over Tehran's nuclear program continued to be supportive to oil prices, analysts said.
Iran has started using extra machines installed this year to enrich nuclear material to higher levels more efficiently, in violation of United Nations sanctions, the U.N. nuclear agency. [
]Japan may consider cutting crude oil imports from Iran as pressure builds from the United States to impose sanctions on the Islamic Republic over its nuclear program, a Japanese trade official told Reuters. [
]GASOLINE WEAKNESS EYED
The slow recovery for employment continues to hamper oil demand growth and keep crack spreads under pressure, especially for gasoline, analysts and brokers said.
The RBOB gasoline crack spread <RB-CL1=R>, or profit margin, was about $7.67 a barrel on Monday, after ending July above $10 a barrel, according to Reuters data.
"As a result, gasoline demand growth will remain anemic and a significant downswing in refinery activity may be required to balance the gasoline market ...," Jim Ritterbusch, president at Ritterbusch & Associates, in Galena, Illinois, said in a note.
"This was vividly reflected last week in a plunge in the gas crack spreads and a sizable contraction in the front RBOB (gasoline) spread." (Additional reporting by David Sheppard in London, Fayen Wong in Perth and Osamu Tskukimori in Tokyo; Editing by Marguerita Choy)