SINGAPORE, Feb 7 (Reuters) - Sentiment in the Asia-Pacific crude market was weaker on Tuesday as a recent downturn in naphtha cracks weighed on light sweet grades. Some traders said Kitan crude for April could trade at discounts wider than the $4.00 a barrel to dated Brent last seen for March parcels. Two cargoes of Kitan are expected to be offered for April loading, they added. Naphtha cracks has fallen by over $2 a barrel in the past week, after strengthening by more than $12 in the previous three months, Reuters data show. * TENDERS - Indian Oil Corp (IOC) has issued its second tender to buy sweet crude for April loading, traders said on Tuesday. In its first tender awarded last week, IOC purchased 4 million barrels of Nigerian light sweet crude for loading in March-April from Glencore. * AUSTRALIA - Australia's Woodside Petroleum has not restarted production from oilfields off the coast of northwestern Australia that were shut in response to Tropical Cyclone Iggy, and has instead begun maintenance on the fields. The company's Cossack, Wanaea, Lambert and Hermes oilfields also remained shut. * EFS - Front-month Brent/Dubai Exchange of Futures for Swaps (EFS) for March DUB-EFS-1M rose 7 cents to $2.90 a barrel. * MARKET NEWS - China's top refineries will trim their crude oil processing in February to the lowest in four months after running hard in winter to meet a seasonal demand spike and ensure ample supplies during Chinese New Year holidays. - Brent crude's premium to U.S. oil could be poised for another record run after jumping 50 percent over the past week, as an expected build in Midwest inventories again exerts pressure on the U.S. benchmark. - Iraq's Majnoon oilfield, operated with Royal Dutch Shell, is expected to reach 175,000 barrels per day (bpd) production by August this year from current output of 54,000 bpd, a senior official at state-run South Oil Company said on Tuesday. * REFINERY MARGINS - The complex refining margin for Dubai in Singapore was $9.32 per barrel, up from an average of the last five days of $9.90, Reuters data show. Over the last year, the average margin has been $8.16 cents per barrel. * CRACK SPREADS - Fuel oil's March crack fell 47 cents to a discount of $3.76 a barrel to Dubai crude. - Gasoil's March crack strengthened 30 cents to a premium of $18.57 a barrel to Dubai crude. - Naphtha's front-month crack firmed 45 cents to a discount of $5.76 a barrel to Brent crude. * OUTRIGHT PRICES - March ICE Brent was at $115.79 a barrel by 0830 GMT, up $1.69 cents from the previous session.

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