SINGAPORE, Feb 8 (Reuters) - Middle East crude levels were valued at slight premiums on Thursday, traders said, but no deals were heard transacted. Abu Dhabi's April loading Murban crude cargoes, a benchmark grade, was heard at levels at a premium of up to 5 cents to the ADNOC official selling prices (OSP). Offers were heard mainly at premiums of around 5 cents to the OSP, but bids were seen at parity or slight discounts, traders said. * EFS - Front-month Brent/Dubai Exchange of Futures for Swaps (EFS) for March DUB-EFS-1M rose 27 cents to $3.39 a barrel. * OMAN ASSESSMENTS - April Oman traded on the DME was valued at a premium of $1.82 cents to Dubai swap quotes at 0830 GMT, using the settlement price for DME futures, the ICE one-minute marker for Singapore and the Brent-Dubai EFS as calculated by Reuters. * MARKET NEWS - South Korea's third largest refiner signed a rare 20-year deal to buy oil from Saudi Arabia as Asia's crude consumers come under U.S. pressure to reduce imports from sanctions-hit Iran. - Danish shipping and oil company A.P. Moller-Maersk has suspended new oil tanker deals with Iran due to European Union sanctions which will embargo imports of oil from the Islamic Republic into the bloc, a senior Maersk official told Reuters on Wednesday. * REFINERY MARGINS - The complex refining margin for Dubai in Singapore was $8.80 per barrel, down from an average of the last five days of $10.13, Reuters data show. Over the last year, the average margin has been $8.14 cents per barrel. * CRACK SPREADS - Fuel oil's March crack was firmer at a discount of $2.83 a barrel to Dubai crude. - Gasoil's March crack eased 57 cents to a premium of $18.19 a barrel to Dubai crude. - Naphtha's front-month crack strengthened 64 cents to a discount of $6.03 a barrel to Brent crude. * OUTRIGHT PRICES - March ICE Brent was at $117.59 a barrel by 0830 GMT, up 92 cents from the previous session. - April Oman was trading at $116.02 by 0830 GMT, up 85 cents from the previous session.

Source