To answer the question. I believe it's about 20 gallons of gas from a 42 gallon barrel. The remaining portions are made in to diesel, jet fuel,
plastics, ect. I don't know what the refinery and transportation cost are, but just look at the current profits the oil companies are making and
you'll see that they are making off with a load of loot.
Source eia.doe.gov
[edit on 22-9-2005 by dbates]