Saudi Arabia is expected to slash the official selling prices of its crude loading for Asia in August, as Middle East’s crude benchmarks crashed amid the tentative reopening of the Strait of Hormuz and the oil supply increase from the region. Saudi oil giant Aramco, the world’s single-biggest crude oil exporter, is expected to slash the OSP of its flagship Arab Light crude by between $6.50 and $8.00 per barrel, a Reuters survey of industry sources showed on Friday. Refiners polled by Reuters expect the prices of all other Saudi grades,…