OPEC is in the dark on the oil supply outlook for the second half of this year, with Iranian and Russian outages looking increasingly significant but Saudi Arabia reluctant to pump more due to fears of a price crash, sources in the organization said.  An oil contamination forced Russia to halt flows along the Druzhba pipeline, a key conduit for crude into Eastern Europe and Germany, in April. The suspension left refiners scrambling to find supplies and its duration is unclear. Iran’s oil exports are likely to drop further in May as the United States tightens the screw on Tehran’s main source of income. Shipments from Venezuela, also under U.S. sanctions, could fall more in coming weeks. The dearth […]