Only a fraction of people who use Oil know about it's origin and extraction. Once the oil is discovered, it must be extracted. After the extraction, oil is transported to refinery where it is turned into useful products. One such product is gasoline. The gas then gets sold via sellers which ship gasoline in trucks that take it to gas stations.
This graphic details several stages of journey of oil :
-and Oil Consumption
Next time you're at the pump you can take a second to appreciate all the work it took to get your gas to you.