Venezuela’s state-run oil company PDVSA has launched one of its largest oil tenders ever, seeking to buy some 8 million barrels of U.S. or Nigerian light crude for delivery from April through June, according to a document seen by Reuters on Thursday. That would be about 90,000 barrels per day, more than the 50,000 bpd of crude PDVSA bought last year. Then, it purchased mainly African and Russian grades as diluents for its extra heavy oil output and processed them at its Caribbean refineries, according to sources and Thomson Reuters Trade Flows data. If awarded, this and another open tender would double crude volumes purchased by PDVSA, which started importing crude in 2014 amid a decline of its own diluents output. Since a backlog of vessels formed in late 2015 following payment delays […]