April/May is mogas speculation season. It's not unusual for the gas cracks to hit their peak in this period as the speculators load up with visions of shortfalls leading to panic buying. It's also not unusual for them to get their asses handed to them when there is no shortage in early June. I'll be interesting to see how the June contract goes off the board.
My gut tells me this summer's driving season isn't going to be as robust as usual. While raising fuel costs 50% isn't going to stop us rich folks from going on vacation, it will keep a lot of folks a lot closer to home.