Boiling Range and Vapor Pressure
WARNING: This page does not describe the selected car, but rather 99 other vehicles, including the 2010 BMW Z4, 2010 BMW X6 M, 2010 BMW X6, 2010 BMW X5 M, and 2010 BMW X5. However, it is still accessible from the selected car via links, so may be relevant.
Gasolines must be highly volatile. The boiling range and vapor pressure values are used for evaluation. Gasolines do not have a boiling "point", but rather a boiling "line", since they are produced from a mixture of various hydrocarbon components.
The boiling line (boiling range) and therefore vapor pressure have influence on, for example,
- vapor lock
- starting behavior
- evaporation loss
- transition and driving behavior
- engine oil dilution
- perfect combustion
The boiling range is different for summer and winter gasolines. The vapor pressure test is another means of determining the behavior of a gasoline.