Three major wars were waged over it. The war in Europe was ended when the Germans ran out of fuel and the Allies didn't. More recently the Arabian Gulf War started over an invasion of the Kuwait oil fields. . Many people have contributed to this amateur effort. Every attempt to show sources of data and credit is made.
Crude oil is measured in barrels, abbreviated bbls.
One barrel is equal to 42 U.S. gallons. When refined about 20 gallons of gasoline are produced. In addition kerosene, diesel fuel, aircraft fuel, and some of the products listed here result. Natural gas also contributes to these items. Forecast for 4 th quarter 1998 production is 77.1 million barrels per day.