Iran has doubled the amount of oil held offshore in tankers to 20 million barrels, equal to five days of the country's output, said people familiar with the situation on May 2. Demand has declined for Iran's more viscous grades such as Nowruz and Soroush, which contain as much as 3.5 percent sulfur, because few refiners can process them.
High sulfur oil is part of Iran's problem. Let the light sweet crude flow from the JDZ