Iran is said to be offering its main crude grade to customers in Asia at the deepest discount in 14 years, taking a cue from Saudi Arabia in trimming price differentials. National Iranian Oil Co. cut its official selling price for January shipments of light crude to Asia to a discount of $1.80 a barrel below the regional benchmark as Middle Eastern producers vie to keep selling in the region, according to four people with knowledge of the decision. An official at NIOC’s crude-marketing department in Tehran declined to comment. Iran cut the differential to a discount from a premium of 13 cents a barrel to the average of the Oman and Dubai benchmark crudes for December. The light crude grade hasn’t sold at such a steep discount since Bloomberg began tracking the country’s official selling prices in March 2000. Oil prices have collapsed since the Organization of Petroleum […]