Iran's flotilla of fuel smugglers.
Iran has always had problems with fuel smuggling, but as a result of the US blockade, it began to use this method itself to export at least some of the fuel and gain revenue.
Smuggling networks operate around the coast of Pakistani Balochistan and an estimated 6 million liters of fuel enter Pakistan daily, this number is increasing daily but still significantly lower than the 270+ million liters Iran exported before the conflicts.