Take a look at the regulations Cali puts on refineries and then tell me it's all related to collusion. The companies are asking Cali regulators to let them bring in fuel from other states (which is not allowed by Cali regs) in order to get through the shortage. But, hey, keep on believing it's always the evil corporation's fault.
http://video.cnbc.com/gallery/?video=3000120604&play=1
Everyone wants more regs, more regs, more regs, then when something happens and the regs are part of the problem, it's still the Corporations being greedy.