The intricacy of US crude oil export revealed: http://www.reuters.com/article/us-usa-oil-asia-bp-exclusive-idUSKBN13W0EW
Not a US flag vessel in sight.
More facilities able to handle VLCCs are required to export US Crude oil to the world market: http://www.hellenicshippingnews.com/tankers-vlcc-capable-export-facilities-key-to-more-us-crude-exports/