Well, see, the people that run gas stations sell gasoline exactly as it is drill from the earth, with no middlemen or refining processes to deal with at all. Even if there -were- other people handling the oil from rig to pump in some off the wall bizarro world, it's not like they'd ever be tempted to sell their refined product for anything more than the refining costs. And, certainly not at an excessive profit. Also, the oil barons who run gas stations are about as rich as pro athletes and wouldn't need to mark up gasoline any higher than it has to be because they all have money oozing out their wazoos.
Also, oil is really easy to extract from places with new refineries (owned by the gas stations, of course) and there's no lag whatsoever between building an oil rig and getting all the oil in America at once. And there's definitely plenty of oil in America, certainly enough to power all our cars for decades to come. And even if it weren't, I highly doubt oil exporting countries would ever artificially shorten supply to raise gas prices. I mean, with America's favorable world image, why would you want to do that?
In conclusion, I really have no clue what I'm talking about and drilling in ANWR will drop gas to $1.10 a gallon. iViva la revolucion!