Iran has threatened to hit back at EU sanctions with its own embargo.
The move would pre-empt the EU ban on oil imports due to take effect in July and would hit struggling EU economies hard.
Mohammad Karim Abedi, a member of Iran’s National Security and Foreign Policy Commission, said a ban may last up to 15 years.
"We will change the threat into an opportunity for Iran and cut Iran's oil supplies to the Europeans for five to 15 years," Abedi was quoted as saying by Fars news agency on Sunday.
"We will not leave enemies' sanctions unanswered and we will impose other sanctions on them in addition to closing Iran's oil supplies to Europe."
"Banning oil imports from the Islamic Republic of Iran, but delaying the implementation of this ban for six months indicates Europe's fear," the Vice-Chairman of the parliament's National Security and Foreign Policy Commission, Hossein Ebrahimi, told Fars.