The world’s top crude exporter, Saudi Arabia, is expected to slash its official selling prices (OSPs) for crude loading for Asia in June from the record-highs for May as the premiums of the Middle Eastern benchmarks eased this month. Saudi oil giant Aramco is widely expected to announce in early May a reduction of the OSP of the flagship Arab Light crude by between $5 and $12 per barrel compared to the Oman/Dubai average, off which Middle Eastern producers price their crude going to Asia, a Reuters survey of industry sources showed on Tuesday.…