The US is the biggest consumer of gasoline all over the world, where nearly 45% is consumed.
Most of the gasoline that petroleum refineries produce is actually unfinished gasoline (or gasoline blendstocks).
Gasoline blendstocks require blending with other liquids to make finished motor gasoline, which meets the basic requirements for fuel that is suitable for use in spark ignition engines.
Blending terminals are more numerous and widely dispersed than petroleum refineries, and they have equipment for filling tanker trucks that transport finished motor gasoline to retail outlets.
Gasoline varies by grade
3 main grades of gasoline are sold at retail gasoline refueling stations:
Higher octane ratings result in higher prices.
In addition to the different grades of motor gasoline, the formulation of gasoline may differ depending on the location where it is sold or the season of the year.