What does a gasoline’s volatility mean to me?

Volatility is the rate at which gasoline vaporizes at a given temperature. The volatility of a gasoline is important because the liquid gasoline must be mixed with air and vaporized in order to burn in the engine, driving your engine performance. Liquid gasoline will not burn. ExxonMobil gasoline’s volatility is carefully balanced on a seasonal and geographic basis, to provide the correct vaporization characteristics to ensure proper operation in your vehicle, no matter the season or location.