South Korean refiners are expected to enter maintenance in the first half of the year, though it is expected to be "light", a South Korean trader said.

Four Japanese refineries are planning to undergo maintenance over May to June, while two are planning for one in the second quarter, industry sources said.

Two refineries are planning for maintenance over the June-July period.

DUBAI OSP

Dubai has set its official differential to Oman futures for May at a premium of $0.10 per barrel, the Dubai Department of Petroleum Affairs said on Wednesday.

The differential will be applied to the average of daily settlements for the front month May Oman contract at the end of March to set Dubai's official selling price (OSP) for May-loading crude.

SRI LANKA

Sri Lanka's Ceylon Petroleum Corp bought a Murban crude cargo for delivery over April 2 to 6 from ENOC at a premium of $1.57 a barrel to the official selling price, traders said.