Saudi Arabia is handing customers in the world’s biggest oil market sweet treats while limiting sour supplies. The producer cut volumes of its Arab Medium and Arab Heavy crude for April sales to at least two North Asian refiners, according to people with knowledge of the matter. It instead gave the buyers more of the Arab Light and Arab Extra Light varieties to compensate, said the people, who asked not to be identified because the information is confidential. One other buyer in the region received cuts in volumes for all grades it sought. Saudi Arabian Oil Co. also gave full volumes of contractual supplies to two other North Asian refiners, which mostly buy lighter “sweet” crudes that typically have less sulfur and are easier to process than heavier “sour” oils. Processors in South Asia and Southeast Asia got all the oil they asked for in April. The state-run producer […]