Judging by the third quarter OECD inventory trends, it won't be the US where the shortages hit but more likely a european country.

Since Europe exports Gasoline to the US I disagree.
They will stop exports before they suffer internal shortages.
Even in a open market your talking about one buyer on a pipeline and the other needing a tanker.

The gas lines of the 70's were the result of price controls. No one in this administration thinks that price controls are a good idea, hence we will in all probability not have gas lines but rather $7.50 / gallon on the sign out front. That will keep the lines more than adequately short.

The supply will be whatever it will be, the price will simply adjust to keep the good stuff flowing to those willing or capable of paying.