That is a good question, maybe they had some reserve of local supplies like those cylindrical tanks we see near most refineries in the East Bay or East Texas, a

That is a good question, maybe they had some reserve of local supplies like those cylindrical tanks we see near most refineries in the East Bay or East Texas, and the usage would be pretty low because there's only the clan cars and trading to think about, also, Australia does have some petroleum reserves so we could pretend they were near some of the last active wells. :)