The U.S. is producing more of it's own oil than ever before. We have always refined most of it anyway. I think prices will linger around $2.00 something a gallon for gasoline and right at $3 something for diesel for a long time.
But then some states, and for sure the federal government will step in and raise the fuel taxes. Their excuse will be that our nations roads and bridges have to be repaired and the only way is to raise these types of taxes.
Then of course you will see fuel prices right back up to $3.00 - $4.00 range, but more of it will be local/state/federal taxes.