Composition and method for terminal blending of gasolines

A process for producing, at a terminal, a gasoline or BOB of increased octane and having required values of required volatility parameters, from a fungible relatively lower octane regular gasoline or BOB having nominal values of the aforesaid required volatility parameters;

• comprising:
• a) producing in a refinery the aforesaid fungible regular grade gasoline or BOB having nominal values of the aforesaid required volatility parameters;
• b) transporting the aforesaid fungible regular grade gasoline or BOB to a terminal;
• and
• c) blending at the terminal, the aforesaid fungible regular grade gasoline or BOB with an amount of a seasonally adjusted high-octane terminal blend stock having a value of at least one volatility parameter within the aforesaid required values of the aforesaid required volatility parameters of the aforesaid gasoline or BOB of increased octane, which amount is effective to afford the aforesaid gasoline or BOB of increased octane and having the required values of the required volatility parameters.