The world's largest oil traders have quietly stopped supplying petrol to Iran in a clear sign that the threat of sanctions and Washington's behind-the-scenes efforts to convince companies not to sell to Tehran are paying off.
However, the decision by Vitol, Glencore and Trafigura is unlikely to cut Tehran off completely from the global petrol market as traders said Iran's long-standing suppliers were being replaced by small Dubai-based and Chinese companies.
Although Iran is one of the world's biggest oil producers, its refineries are dilapidated and it suffers from runaway petrol demand because of generous subsidies.
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