[alloysteel]

Cities Service disappeared. Deep Rock disappeared. Sinclair disappeared. Humble disappeared. Either these companies were bought out, or simply recast their logos.

Cities Service became "Citgo", Deep Rock became Kerr-McGee, Sinclair mutated into ARCO, Humble was absorbed by Esso or Standard or somebody.

I always wondered about "Humble Oil". That had to be a PR ploy, could you imagine any refiner caling themselves "Arrogant Oil Company"?

[B-Chan]

Sinclair is still very much around, and it's not affiliated with any other refiner or distributor. (ARCO was absorbed by Chevron, by the way)

[Eric in the Ozarks]

Sinclair Oil is now owned by a guy in Salt Lake City. They have refineries in Tulsa, OK, Casper and Rawlins, WY.

[r9etb]

"Humble Oil"

Named for Humble, TX, perhaps?