Gasoline is one of the major petroleum products produced from processing crude oil in a petroleum refinery. asoline is one of the higher-valued light products (along with jet fuel and diesel). It is used almost exclusively in the transportation sector, mostly as a fuel in automobiles and other light-duty vehicles. Demand for gasoline varies seasonally with the highest demand during the Northern Hemisphere summer. Summer is also when gasoline quality specifications (especially vapor pressure) tend to be tightest, resulting in generally higher prices in these months.