Emergency Petroleum Supply Act - Amends the Energy Policy and Conservation Act with respect to each offering of a quantity of petroleum product during a drawdown of the Strategic Petroleum Reserve to prescribe guidelines according to which the State of Hawaii may: (1) submit binding offers for (thus becoming entitled to) and purchase categories of such product, receiving, at the Governor's request, first preference in scheduling for lifting; and (2) enter into agreements with eligible entities (local refineries) which may act on the State's behalf.

Instructs the Secretary of Energy, at the request of the governor of an insular area, to assist such area in its efforts to maintain adequate petroleum products supplies for a maximum 180-day period.