The huge and growing gasoline demand dictates that refiners maximize gasoline volume. After maximizing component volumes and meeting octane and other specs with minimum give-away, what else can be done?One way to get a few more barrels is to optimize blending to get the highest octane blending values possible while meeting all the specs. This will allow slightly lower reforming severity, giving a slight increase in volume. However, the blending linear program will not achieve this goal if inaccurate blending values are used.Use of refinery blend data is almost guaranteed to produce inaccurate blending values relative to octane (incremental blending values). One reason is narrow compositio...