BP and Amoco (1998)
BP merged with Amoco in 1998, creating one of the world's largest oil companies. BP spent years converting Amoco's gas stations to its own branding, but Amoco-branded stations lingered in the Chicago area for more than a decade.
Amoco stations gradually disappeared from most markets within a few years.
The Amoco name faded from the roadside but survived in corporate history and some regional pockets.
Shows how a regional brand can persist for years after an acquisition, and how the pace of rebranding varies by market.
