In the end, the rumored pre-election release in mid-September of U.S. strategic oil reserves, aimed at easing high gasoline prices, never materialized. But if the tense political backdrop in the Middle East escalates, many believe supply threats will return to the fore, sending the price of benchmark Brent crude oil past $120 a barrel and renewing calls for a release of emergency supplies.

A move in U.S. retail gasoline past $4.00 a gallon would also represent "the trigger for words and pressure by the Saudis and U.S. government" to act and bring more oil to the market, said Fereidun Fesharaki, chairman of FACTS Global Energy (FGE) an energy consultancy and a former energy adviser to the Prime Minister of Iran in the 1970s. "It has to be coordinated and U.S. will not act alone."