The price of gasoline and the price of oil don't really have much to do with each other. They fluctuate independently depending on the demand for each.
If all our refineries exploded on the same day, what would prices do?
Gasoline would immediately soar. Oil would plummet because there would be no place to use it.
So, unless the Saudis are selling us gasoline instead of crude, this temporary shortage of gasoline in America doesn't benefit them at all.