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Gasoline: is a hydrocarbon fuel used mainly in internal- combustion engines. This fuel is obtained via filtration of crude oil. The quality of this type of fuel is measured by the octane number (from 0 to 100), which points to its resistance of early burning. This number is obtained by comparing the performance of its resistance of early burning with a mixture of C7H16 and C8H18. For instance, the performance of “Gasoline 95” equals the performance of a mixture of 95% C8H18 and 5% C7H16. |