* Oil near five-month low, retreats towards $107
* Gustav fears ease as refinery, field damage seen limited
* Exxon Mobil, Shell said to tap U.S. emergency crude stocks
(Updates prices)
By Jane Merriman
LONDON, Sept 2 (Reuters) - Oil slid to around $107 a barrel on Tuesday after initial reports showed Hurricane Gustav had spared major U.S. Gulf oil facilities.
U.S. crude <CLc1> was $107.16 a barrel by 1321 GMT, down $8.30 from Friday's close. It touched a session low of $105.46, its lowest since April 2.
A U.S. public holiday on Monday meant the New York Mercantile Exchange did not issue an official settlement price for U.S. crude on Monday.
London Brent crude <LCOc1> was down $3.59 at $105.82.
As the hurricane was downgraded to a tropical storm, the market refocused on bearish factors including a softer global economy, weaker demand for oil and a stronger U.S. dollar.
These had already begun to drive down prices, which have dropped about $40 from a peak of $147.27 a barrel hit on July 11.
Hurricane Gustav, combined with Russia's conflict with Georgia, which disrupted flows of oil and gas, had halted the slide.
"If it were not for these threats, we would have been testing $100 already," said Mike Wittner of Societe Generale.
An upturn in the dollar, plus falls in oil demand in the United States and China, the world's top two energy consumers, look set to exert further pressure on the market.
The weak dollar contributed to oil's surge this year as investors turned to oil as a hedge. The U.S. currency has shown signs of bottoming out and hit a 10-month peak against a basket of currencies on Tuesday. [
]"Economic woes and the dollar strength will help oil move down. It's highly likely to go below $100," said Christopher Bellew of Bache Commodities Limited.
LIMITED DAMAGE
Early checks by some U.S. refiners reported only limited damage from Gustav, which had originally been classed as the biggest threat to the U.S. Gulf oil sector since devastation from Hurricane Katrina in 2005.
Oil companies began checking oil rigs, refineries and pipelines on Tuesday. [
]Some 1.3 million barrels per day of offshore oil production and some 2.67 million bpd of refining capacity was shut because of the storm. [
]The Gulf is home to a quarter of U.S. oil output and more than a third of U.S. refining capacity.
Louisiana Governor Bobby Jindal said on Monday that Exxon Mobil Corp <XOM.N> would ask for crude oil from the U.S. emergency supply on Tuesday and Shell Oil Co <RDSa.L> was expected to make a similar request. [
] (Additional reporting by Barbara Lewis in London and Chua Baizhen in Singapore; editing by James Jukwey)