* Venezuela, Ecuador, Kuwait call for output restraint -report
* Informal OPEC meeting scheduled for Sept. 26-28 in Algeria
* Russia dismisses overture of another production freeze
* China's fuel exports hit record highs (Adds latest market moves, fund manager comment, paragraphs 9-13)
By Barani Krishnan
NEW YORK, Aug 8 (Reuters) - Oil prices jumped about 3 percent on Monday amid renewed speculation that OPEC would try to restrain output, easing oversupply worries had pressured the market to three-month lows last week.
The Wall Street Journal reported last week that OPEC countries such as Venezuela, Ecuador and Kuwait want to take another stab at cooperation between the 14-nation Organization of the Petroleum Exporting Countries and non-members such as Russia.
The last such initiative failed in April after Saudi Arabia backed out of talks in Doha, Qatar, citing Iran's refusal to join in a so-called production freeze.
Qatar's Energy Minister and OPEC President Mohammad bin Saleh al-Sada said in a statement the producer group was in "constant deliberations with all member states on ways and means to help restore stability and order to the oil market". statement on Monday added that an informal meeting of OPEC member countries was scheduled to take place on the sidelines of the International Energy Forum, which groups producers and consumers, in Algeria from Sept. 26-28.
The energy minister of Russia, the world's biggest oil producer, said crude prices were not at levels that warrant intervention. But he remained open to negotiations. would appear that OPEC calls for restraint would be inevitable," Jim Ritterbusch of Chicago-based oil markets consultancy Ritterbusch & Associates said, citing concerns over rising U.S. oil rigs and weakening energy demand.
The U.S. oil rig count rose last week for a sixth week in a row. In China, fuel exports rose over 50 percent from a year earlier to a monthly record 4.57 million tonnes, adding to a global glut. RIG/U West Texas Intermediate (WTI) crude CLc1 was up $1.28, or 3 percent, at $43.08 per barrel by 1:31 p.m. EDT (1731 GMT). WTI hit April lows beneath $40 a barrel last week.
Brent crude LCOc1 rose $1.16, or 2.6 percent, to $45.43.
Some fund managers were pessimistic the OPEC-fueled rally would last.
"Until proven otherwise, this is still a correction in a bear market," said Matthew Tuttle, chief executive at Tuttle Tactical Management in Riverside, Connecticut.
"You can have massive up moves like this and if you can trade it, great. But if you're looking at another run up to $50 and beyond, I'm not ready to go there. I think we still see under $35 a barrel before we get to $50."
Hedge funds cut their bullish exposure to Brent to the smallest since January while paring positive bets on WTI to the least since February, data on Friday showed. Monday, traders shrugged off a Genscape report of a build of more than 307,000 barrels at the Cushing, Oklahoma delivery hub for U.S. crude futures in the week to Aug. 5, cited by traders. A Cushing inventory rise of over 200,000 barrels is typically bearish for crude.
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