“Gasoline” or petrol is a slice of oil fermented between 70 and 175 degrees C and hydrocarbon content of C5 to C11 or C12.Natural gas, which accounts for about 15 percent of crude oil, is used in combustion engines. Normal gasoline is a complex of hydrocarbons such as kinds of paraffin (alkanes), naphthenes (cycloalkanes) and olefins (alkenes); But octane (C8H18) is considered as one of the specific compounds in gasoline.