I must be old because I fondly remember the SInclair gas stations as a kid. They mostly disappeared over the years, however when we moved from California to the east coast in the late 1990s, it was awesome to be driving the moving truck along I-80 to the east coast and getting gas at Sinclair a couple of stops in the west. I'm glad to hear those haven't closed down yet. I bought a travel mug at one of their stations just as a momento, and still have it and it's a conversation piece even today.
Here's a wiki link to the history of Sinclair.
https://en.wikipedia.org/wiki/Sinclair_Oil_Corporation
