It’s a combo of several things.
Yes, the seasonal switchover to the summer fuel mix, plus the fire in Houston at that plant that made chemicals for that among other things.
Floods and snowstorms added their punch and the Saudis cutting back on production causes the world prices to rise..................
Yet, according to FR (which, btw, is the only news source I consult any more), we’re exporting more oil than ever. Maybe it would be in our own best interests to a) keep the oil here and forget about the rest of the world, b) build some refineries and c) get rid of the EPA since they’re the ones saying we need the summer fuel mix in the first place.