Gasoline is
more volatile than diesel oil, Jet-A,
or kerosene, not only because of the base constituents, but
also because of additives. Volatility is often controlled by
blending withbutane, which boils at *0.5 °C. The volatility of
gasoline is determined by the Reid vapor pressure (RVP)
test. The desired volatility depends on the ambient temperature. In
hot weather, gasoline components of higher molecular
weight and thus lower volatility are used.
