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The largest share of the 42 gallons of crude oil ends up as a finished motor gasoline. Motor gasoline accounts for 19.65 gallons (~ 47%) of the finished products produced from a barrel of crude oil. Next is distillate fuel or diesel at 10.03 gallons (~ 24%) . A distant third is jet fuel at only 4.07 gallons per barrel (~ 10%) of crude. Residual oil is typically around 1.72 gallons per barrel (~ 4%).

Other petroleum products that are created from a barrel of oil during the refining process include: still gas, petroleum coke, liquified refinery gas, asphalt and various oils for lubricants, kerosene, waxes and other miscellaneous products. These "other" hydrocarbon products account for the final 15% of the barrel or around 6.53 gallons of the 42 gallon barrel.