SINGAPORE, Feb 28 (Reuters) - The Dubai cash market weakened further on Thursday with the partials trading more than a dollar below the previous session on the last trading day of the month, traders said.     The spot Middle East crude market remained steady as traders awaited official selling price (OSP) announcements from producers due next week. Prices may be raised slightly on expectations of a pick-up in demand, traders said.          TRADES:     - April Dubai partials changed hands at between $106.75-106.85 per barrel on Thursday, compared with $108.15-108.50 on Wednesday.      The price has dropped from $110.5 at the start of the month largely on selling by Arcadia Energy.      On Thursday, Arcadia sold ten partials in the over-the-counter cash window, two to Gunvor and eight to Vitol.                  *OSP     -  The official selling price (OSP) for Oman crude in April will rise to $111.21 a barrel, up $3.43 from the previous month, Reuters calculations based on data from the Dubai Mercantile Exchange (DME) showed on Thursday.      The April Oman OSP is the average of the daily Oman settlements at 0830 GMT in February for the front-month contract. The Oman OSP for March was $107.78 a barrel. So the April Dubai crude OSP, set at a 10-cent premium to DME Oman, will be $111.31 a barrel.          REFINERY NEWS:     - Oman's state-run Sohar refinery said it is shutting down on Thursday for 46 days of maintenance. The refinery is expected to restart around April 15.  
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       - Japan's top oil refiner, JX Nippon Oil & Energy Corp plans to refine 2 percent more crude oil in March from a year earlier for domestic consumption and boost oil product exports by 62 percent to take advantage of improving margins.  
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                           *MARKET NEWS     - Yemen's Aden Refinery (ARC) has agreed to buy 13 cargoes of gasoline for delivery between March and June from Glencore, Totsa and Vitol, traders said on Thursday.  
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       - Japan's crude oil imports from Iran in January fell 29.5 percent from the same month a year ago, trade ministry data showed on Thursday, in line with reductions by other Asian buyers as Western sanctions on Tehran cut shipments.  
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             CRUDE ($/bbl)                      Price      Prev      Change  APR DME Oman diff to Dubai swap      -0.02      0.11     -0.13  APR Brent   
  BRENTSGMc1
               112.03    113.26     -1.23  APR Dubai  
  DUBSGSWMc2
                107.00    108.44     -1.44  APR DME Oman                        106.98    108.55     -1.57  APR Brent/Dubai EFS  
  DUB-EFS-1M
        5.03      4.82     +0.21                                                            PRODUCT CRACKS                                            MAR fuel oil crack  
  FO180SGCKMc1
      -9.21     -10.27    1.06  MAR gasoil crack  
  GOSGCKMc1
           20.46      20.91    -0.45  APR naphtha crack  
  NAFOBSGCKMc1
       -8.42      -7.76    -0.66                                                            COMPLEX REFINERY MARGINS  
  REF/MARGIN1
                      Today                              11.91                  Last 5 days                        11.01                  Last 365 days                       7.46                    (Reporting by Ramya Venugopal; editing by Jason Neely)  ((ramya.venugopal@thomsonreuters.com)(+65 68703826)(Reuters Messaging: ramya.venugopal@thomsonreuters.com.reuters.net))  
 ((RECENT CRUDE OIL TRADES           Asia... 
  ACRU/T
        Europe... 
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                                CRUDE OIL MARKET NEWS           Crude oil tenders in Asia................... 
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             Refinery outages in Asia.................... 
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             Global arbitrage news and flows................. 
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             W.African crude imports to Asia,  monthly........ 
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                             REFINERY MAINTENANCE DIARIES           Asia... 
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      Europe... 
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                                NATIONAL CRUDE IMPORT DATA           Japan.............. 
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                                   CRUDE OIL INVENTORY DATA           Japan... 
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       US... 
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                             CRUDE OIL PRODUCTION/OILFIELD NEWS           OPEC output survey... 
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             New projects..... 
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                                CRUDE OIL MARKET REPORTS           Middle East........... 
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      Asia-Pacific........ 
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             West Africa......... 
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     North  Sea............ 
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             Asia outlook....... 
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     Europe  outlook..... 
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             Global futures report... 
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     Technicals  report...... 
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                                     PRICES           For all Official Selling  Prices...................... 
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             For a POLL on oil  prices............................ 
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             NYMEX and ICE oil  futures........................... 
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             Dubai, Oman swaps and  spread............... 
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             Middle East physical crude  diffs............... 
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             Australia physical crude, Tapis  swaps.......... 
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             Asia-Pacific physical  crude.................... 
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             All Asian crude oil  differentials................ 
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             All Asian crude oil outright  prices.................. 
  0#C-A
      ))
  Keywords: MARKETS MIDEAST CRUDE/