Historical clue formulations

• Bygone Buick — 2020-06-13
• Old Buick — 2018-10-14
• Former full-size Buick — 2017-07-24
• Final car built in Buick City before its shutdown — 2017-02-04
• Old Buick — 2006-08-19
• Former Buick — 2006-06-25
• Fancy Buick — 2006-02-28
• Park Avenue alternative — 2003-09-27