A better question is 'What is Diesel'. And THEN, you have to ask yourself: 'How easy is it to turn JBII's 'Near Diesel (which is basically 85% Diesel mixed with 15% Gasoline)' into Diesel that can be sold anywhere'.
Seems like that would be pretty easy huh? Maybe all you need is to separate the Gasoline out, and use a Blending Facility to make 'Diesel'.....and JBII HAS a Blending Facility.
And guess what. The Gasoline you just separated can be sold ALSO.