* S&P 500, Wall St. rally help lift oil
* U.S. crude inventories seen hit by pipeline snag
* Coming up: API oil data, 4:30 p.m. EDT Tuesday (Updates prices, adds details, Reuters weekly EIA poll)
By Robert Gibbons and David Sheppard
NEW YORK, Sept 20 (Reuters) - Oil rose by almost 2 percent on Monday toward $75 a barrel, snapping a four-day slump, tracking broad gains in equity markets that were buoyed by optimism about the strength of the economic recovery.
Oil also drew strength from an expected drop in crude oil inventories in the United States following the outage on one of the main pipelines delivering crude from Canada last week.
The S&P 500 <.SPX> hit a four-month high and all three major indexes rose 1 percent as Wall Street sought to extend a three-week rally ahead of Tuesday's monetary policy meeting by the Federal Reserve. [
]"The petroleum markets are considering the upside in early trading on Monday, encouraged by an upturn in the S&P 500," Tim Evans, analyst at Citi Futures Perspective in New York, said in a research note.
U.S. crude for October <CLc1> delivery rose $1.20 to settle at $74.86 a barrel, trading from $73.32 to $75.45. The October contract expires on Tuesday.
U.S. November crude <CLc2> closed up $1.27, or 1.7 percent, at $76.19 a barrel. The rally had little volume behind it, with the total number of contracts trading hands about 25 percent below the average volume over the last 30 days, according to Reuters data.
ICE Brent for November <LCOc1> closed up $1.10 to $79.32.
Trading sources also said crude futures were being supported by expectations that the week-long shut down of Enbridge Inc's <ENB.TO> Canada-to-U.S. crude oil pipeline restarted on Friday may have pushed U.S. crude inventories lower last week.
OIL STOCKS
A preliminary Reuters poll of 10 oil tracking analysts showed U.S. crude stocks may have fallen last week by 1.9 million barrels because of the Enbridge outage, though traders may be inclined to look past this week's figure given the short-term nature of the supply disruption. [
]Gasoline stocks are expected to have fallen by 100,000 barrels, while distillate stocks, which include heating oil and diesel, are expected to have risen by 300,000 barrels.
An official designation of the end of the U.S. recession also added to the optimistic sentiment, traders said.
The National Bureau of Economic Research, considered the arbiter of U.S. recessions, said on Monday the U.S. recession ended in June 2009, making it the longest downturn since the Great Depression of the 1930s. [
]"The recession is declared over, sprinkling some economic optimism and the stock market is up and oil prices are tagging along for the ride," said Phil Flynn, analyst at PFGBest Research in Chicago.
U.S. stocks held gains despite a survey that showed U.S. home-builder sentiment held steady in September. It was expected to strengthen. [
]The Fed's statement on Tuesday will be closely scrutinized for signals on the debate about whether further large-scale asset purchases are needed to support the recovery in the world's top oil consumer.
The Federal Reserve is expected to renew a promise to keep its portfolio from shrinking but is not expected to take new steps to ease monetary policy. [
]A weak dollar also was supportive to oil. A weak dollar can lift oil prices because it makes dollar-denominated oil less expensive for buyers using other currencies.
Oil prices shrugged off a downbeat assessment from the Organization for Economic Cooperation and Development, which said on Monday a U.S. recovery was under way but at such a moderate pace that high unemployment will persist for some time. [
]Since May, crude prices have been hemmed in between the $64.24 intraday low on May 20, the weakest front-month price since July 30, 2009, and the 2010 peak of $87.15 hit May 3. Investment bank Societe Generale said rallies in crude have been stalled than stronger than expected non-OPEC supply and high stocks in industrialized countries. As a result the bank cut its average price forecast for crude oil next year by $7 to $85 at the end of last week. (Additional reporting by Alex Lawler in London and Alejandro Barbajosa in Singapore; Editing by Lisa Shumaker)