Gasoline is a clear liquid petroleum product that is used primarily as fuel in internal combustion engines. It consists essentially of organic compounds obtained by fractional distillation of petroleum reinforced with a variety of additives. On average, 42-gallon barrels of crude oil provides about 19 US gallons of petrol when processed in an oil refinery although this varies analysis of crude oil.
Gasoline characteristic of a particular gasoline blend to withstand premature ignition is measured by its octane gasoline produced in different degrees of octane. Tetraethyl lead and other lead compounds are no longer used in most areas to regulate and increase octane but many other additives are added to gasoline to increase its corrosivity control chemical stability and achieve fuel cleaning and determining performance characteristics under intended use. Sometimes Gasoline also contains ethanol as an alternative fuel for economic or environmental reasons.
Gasoline used in many internal engines in transport and industry has a significant impact on the environment, both local effects. Gasoline can also be declared in the environment not removed as liquid and as vapor leaks and handling during transportation and delivery of production storage tanks spill Storage tanks for gasoline must have comprehensive on site measures to detect and prevent such leaks Gasoline contains benzene and other carcinogens.