How is a barrel of oil dispersed? how much to gas, refined oils, plastics, etc....?

Look here:





http://www.eia.doe.gov/neic/infosheets/p鈥?/a>





It's about halfway down the page.





DKHow is a barrel of oil dispersed? how much to gas, refined oils, plastics, etc....?
Various grades are used for different purposes. It's not like a grain of wheat where the bran is used for bran and made into bran flakes and the germ for wheat germ, etc.