How did higher volatility gasoline help the situation?
Certain components of gasoline, such as butane, cause it to be more volatile at high temperatures. Refiners do not add as much of these components with higher volatility to gasoline in the summer months. However, under the nationwide waiver, refiners were able to produce “winter grade” gasoline containing larger volumes of components with higher volatility. Allowing the use of these higher-volatility components can potentially increase the volume of gasoline produced by refiners.
