South Korea has begun testing super-light U.S. oil sold by Anadarko Petroleum Corp as a substitute for Iranian crude while it awaits word from Washington on whether it can keep buying oil from the Middle Eastern nation, sources said. South Korea is one of Iran’s biggest Asian customers and was one of eight importers that received waivers to keep buying Iranian oil when the United States re-imposed sanctions in November. Washington is expected to reduce those waivers in May, disrupting South Korea’s supply of Iranian condensate, an ultra-light crude oil that is used in its large refining and chemical industry. West Texas Light (WTL) is seen as a potential substitute for Iranian condensate because, when refined, WTL yields a large volume of the refined product naphtha, which can be used to produce petrochemicals. Most WTL is produced in the western part of the Permian Basin […]