SINGAPORE, May 25 (Reuters) - Sentiment in the Asia-Pacific crude market stayed weak on Friday as Vietnam offers more prompt Bach Ho crude, adding more volume to an already well-supplied market. Yet, certain grades such as Labuan and Kutubu are finding support from limited supply and firm demand for distillate-rich crudes. * TENDERS - Vietnam's PV Oil offered Bach Ho crude for lifting in June to July in a tender to close on May 28 with bids valid until May 30. Buyers can opt to buy 200,000-600,000 barrels of Bach Ho per cargo and bid on a free-on-board (FOB), cost-and-freight (C&F) and cost-insurance-and-freight (CIF) basis. The offer comes on top of May-July barrels that PV Oil has already sold to Shell, Mitsui, Petrosummit, Itochu, Glencore, Gunvor, Petrodiamond and Trafigura. Vietnam plans to charter some tankers to store Bach Ho crude following an outage at the country's sole refinery, trade sources said. - Indonesia's BPMIGAS issued a term tender offering Duri crude for loading from June 2012 to May 2013. Buyers can opt to lift 200,000-450,000 barrels of the heavy sweet crude each month. The tender will close on May 28. The regulator last sold Duri crude for loading between December 2011 and May 2012 at a premium close to $5 a barrel to ICP. - Weak naphtha cracks and an ample supply of light sweet crude weighed on Kidurong crude. Petronas sold 300,000 barrels of Kidurong crude to load on July 27-31 to a trader at about $1 a barrel above dated Brent, about $1 lower in premium than June. - PV Oil likely sold 250,000 barrels of Rang Dong crude to load on July 13-19 to Shell at a premium between $2 and $3.50 a barrel to the Minas formula. - Taiwan's CPC has awarded an unusually large import tender for nearly 6 million barrels of Angolan crude oil ahead of the expected start of a new residual fluid catalytic cracker this summer. CPC will buy four cargoes of Angola's Cabinda grade and two cargoes of the Nemba grade from Unipec, Total, Chevron and Sonangol for July loading, traders said. - Russia's Rosneft offered 730,000 barrels of ESPO for July 20-23 loading in a tender that will close on May 29. * TRADES - ExxonMobil sold the sole Kutubu cargo for July to Petrobras at a premium of about $4 a barrel to dated Brent, stable from the previous month. The light sweet grade is supported as only one cargo is available. - Petronas sold a second Labuan cargo for July at about $8.80 a barrel above dated Brent, a premium close to the first cargo sold in a tender, on robust demand for the grade which has a high yield of middle distillates and vacuum gasoil. Petronas may offer a partial cargo, its third in July. * MARKET NEWS - An increasing number of forecasters expect Brent crude to average less than $100 a barrel next year because of downward pressure from Europe's debt crisis, a slowdown in Chinese economic growth and hopes for a resolution of the Iranian nuclear crisis. - Japan's top oil refiner, JX Nippon Oil & Energy Corp, shut the 189,000 barrel-per-day crude distillation unit (CDU) at its Kashima refinery north of Tokyo on Monday due to a glitch in operations. CRUDE Price Prev Change JULY Brent 107.07 105.26 1.81 JULY Brent/Dubai EFS DUB-EFS-1M 3.80 3.63 0.17 PRODUCT CRACKS Price Prev Change JUNE fuel oil crack -2.44 -3.08 0.64 JUNE gasoil crack 15.43 15.97 -0.54 JULY naphtha crack -11.96 -11.93 -0.03 COMPLEX REFINERY MARGINS Today 7.34 Last 5 days 6.38 Last 365 days 7.53

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