Gasoline contains around 150 chemicals, including BTEX compounds and MTBE, to improve engine performance and reduce pollution. Other chemicals include naphthenes, olefins, oxygenators, and parafins. Gasoline is made by distilling crude oil and may include additives like ethanol. Leaded gasoline was banned in the US in 1996.
Gasoline ingredients vary according to government regulations, but in general, gas contains about 150 chemicals. These chemicals serve a variety of purposes, from improving engine performance to reducing pollution. The BTEX compounds (benzene, toluene, ethylbenzene and xylene) in the fuel give it its characteristic odor and flammability. Methyl Tertiary Butyl Ether (MTBE) is an additive that helps reduce toxic fumes. Other chemicals commonly found in fuel include: naphthenes, olefins, oxygenators and parafins.
More information about gas:
Gasoline is made by distilling crude oil, but since the resulting material cannot be used in engines (the octane rating is too low) a variety of other chemicals or additives are included.
Ethanol is a type of gasoline that includes ethyl alcohol. Derived from corn, ethanol helps improve fuel efficiency and reduce environmental impact.
Tetraethyl lead was a common and inexpensive gas additive that improved engine performance. Due to associated health and environmental concerns, however, leaded gasoline was banned in the United States in 1996.
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