Gulf states could deploy an energy “nuclear option” by halting exports entirely, removing up to 20% of global oil supply.
Doing so, they could potentially force the United States and Israel to reconsider military operations against Iran.

OilPrice.com
What Happens If Gulf Producers Deploy 'Nuclear Option' To End Middle East WarThe shutdown of the Strait of Hormuz has stranded about 15 million barrels/day of Gulf oil exports, giving Gulf Cooperation Council producers major leverage in the Middle East conflict.