They have not built any new refineries because there is no need for them. In fact at least 3 were closed last year. In the early 50's 10 miles per gallon was common. Trucks got 4 or 5. Now cars get 30. The only way they would build a new one. Either the feed stock would come out of coal or shale that would require a whole new way of doing it. Then it would have to be cheaper than converting an old refinery.
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