I appreciate the courtesy of your concise reply. I don't understand #4, except possibly as 'there is no market for it in the US'? I wondered about refining capacity in the US for heavy sour crude, and lack of that capacity could be why there isn't market for it here. There does seem to be international market for heavy sour crude since it is being bought and shipped, particularly to China, I have read. I'd appreciate any clarity you might provide.