How much gasoline per barrel of oil?

Less than half of every gallon of oil becomes gasoline. For heavy crude, like that produced by Venezuela, the number seem to be less than 10%. If a barrel of Arabian or West Texas light sweet crude produces 19.5 gallons of gasoline, and the barrel costs $135, each gallon of gas costs nearly $7.00. That is offset somewhat, because the remaining 22 gallons may be used to make heating oil, diesel or plastics. Still, this suggests we're going to see much higher gas prices, sooner than anyone expects. At $3.70 a gallon, the oil companies are practically giving the stuff away.


http://www.newton.dep.anl.gov/askasci/eng99/eng99288.htm

Question - HOW MANY GAL.OF CRUDE OIL IN A BARREL? HOW MANY GAL OF GAS
DOES THAT EQUAL?
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There are 42 gallons / barrel of crude oil. The conversion to gasoline
depends upon several factors -- refining efficiency, product mix desired by
the refiner, quality of the crude to name a few. The following sites provide
additional info.

http://www.petroleum.org/petrokids/petroperbbl.htm
http://www.newton.dep.anl.gov/askasci/gen99/gen99675.htm

Vince Calder
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A barrel contains 42 gallons. After refining, it makes about 19.5 gallons
of gasoline in addition to numerous other products such as heating oil..

If you can get to the web,
http://www.petroleum.org/petrokids/petroperbbl.htm
has many interesting numbers related to your question.

Best, Dick Plano, Professor of Physics emeritus, Rutgers University

ok, great. that explains the record billions in profits.

Most of the refineries are investing in updating/upgrading their cat crackers to maximize the amount of light hydrocarbons they can get out of the crude.

Truly, the Venezuelan crude is crap. If I'm not mistaken, there are only 2 refineries in the world that have the ability to refine it, and they're both in the US, and both in Louisiana.