From a nationalistic perspective, having oil trade 'in country' of production sounds ideal. Countries like Iran, Venezuela, are likely to be more protectionist and want to extract more value out of a declining resource as time goes on.

I'm sure one day much of the refined gasoline in the world will come from producer nations, not from domestic consumer/importer nations.

Gonna happen in the Phillipines soon...

"I'm sure one day much of the refined gasoline in the world will come from producer nations"
I'm going to have to differ on that. Refining the gasoline is a matter of capital and efficiency, and that is one thing our market system has an ample supply of. Most resource economies tend to remain resource economies until the supplies run tight, whereas resource-poor nations (ie Japan), tend to dominate the manufacturing of secondary products.