Big Oil aren't the only players in the market; there are smaller operations (true, there are only a few in the refining game anymore, but they are out there) that could expand operations and thereby try to grab a bigger piece of the pie.
I know of one particular small outfit that has set contracts out for about 6-8 months that favor their existing customers; they are running flat-out and have no excess capacity to speak of anymore and barely had any the last 5 years.
JaTo
e-Tough Guy
Missouri City, TX
99 Contour SVT
#143/2760
00 Corvette Coupe