SINGAPORE  - The official selling price (OSP) for Oman crude in August will rise by $7.90 to $41.58 a barrel, Reuters calculations based on data from the Dubai Mercantile Exchange (DME) showed on Tuesday.

The August Oman OSP is the average of the daily Oman settlements at 0830 GMT in June for the front-month contract OQc1 .

The Dubai crude OSP, set at a discount of $2.50 a barrel to DME Oman was calculated at $39.08 a barrel.

DME exchange data can be found on the website at: http://www.dubaimerc.com/historical.aspx.

(Reporting by Shu Zhang; editing by Jason Neely) ((shu.zhang@thomsonreuters.com; +65-6870-3549; Reuters Messaging: Twitter @shuzhang4))