Please understand, this is more an issue due to different types of oil and the location.
Much of the Gulf Coast refineries have been upgraded to to make use of heavy sour crude. And the new shale production is light sweet. We have already taken our Gulf Coast area light sweet imports down to zero. It is not as simple as total oil numbers.
Frankly, I think we need more refineries. We have needed them for several decades. One refinery goes down, and it has negative ramifications clear across the nation.
We just had a refinery go down here in California. In short order prices rose over $1.00 per gallon.
That magnified the natural rise after crude rebounded.
I’m not industry savvy enough to address the light crude vs sweet crude issue. I won’t give you an alternative argument there.