The Adrian Darya, previously known as the Grace 1, carries 2.1 million barrels of crude, worth some $130 million.
Ali Rabiei made the announcement at a news conference on Monday in Tehran. He says the buyer of the oil will decide the ship’s ultimate destination.
The tanker was held for weeks off Gibraltar after being seized by authorities there on suspicion of violating EU sanctions on Syria.
The US has a warrant in federal court to seize the ship and has been warning nations not to accept it.
The ship had put its destination as Turkey, but later removed it. It’s still in the Mediterranean Sea heading east.