OPEC has a hard time agreeing on what to have for lunch. Venezuela, IIRC, sells most of its crude to the United States. The infrastructure really isn't there for it to start selling to someone else in a hurry. And oil revenue is a huge part of their income. Don't look to them to be voting for or participating in such a boycott.

Indeed the oil-producing countries are pretty addicted to the $$ the US sends into their midst. There's a reason there hasn't been a crisis like the 1970s since the 1970s.