Didn't know that, though I guess it makes sense.
What I was trying to say. You want to squeeze more gas out of maxed-out refineries, you have to refine oil that has a "greater amount of gasoline" in it (yeah, I know that's way unscientific...I can't remember the chemistry off the top of my head)...which drives up demand for light sweet crude.
Basically, it's a complicated subject, where oil can drive gas prices or vice-versa. But of course everyone's an expert anyway, because they heard something on the news...