The boiling point of gasoline ranges between 104 and 392 degrees Fahrenheit. The wide range of boiling points is due to the many different blends of components available to provide different characteristics such as higher octane, lower fuel deposits and overall volatility.
The combination of chemicals in gasoline to produce different octane levels is one factor that influences the boiling point. A fuel's octane influences its tendency to join in reactions prior to combustion, and increasing octane means adding agents that minimize those reactions. The specific additive used to boost octane, reduce harmful emissions or produce other effects pushes the boiling point higher or lower.