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http://www.gravmag.com/oil.html

One barrel of crude oil makes about 19Ѕ gallons of gasoline, 9 gallons of fuel oil, 4 gallons of jet fuel, and 11 gallons of other products, including lubricants, kerosene, asphalt, and petrochemical feedstocks to make plastics.
Итого, 11/(11+4+19+9) = 26 ( Read more... )