Further to Rodders response, 158 litres of crude might yield 72 litres of gasoline or petrol, and 41 litres of diesel plus and an assortment of other products which when added up in total, yield approx 6% more than the original 158 litres.
source:
http://tonto.eia.doe.gov/dnav/pet/pet_pnp_pct_dc_nus_pct_a.htm
Robo...
