WSCO Petroleum operates the Astro chain of convenience stores in Oregon and Washington. With more than 400 employees, WSCO distributes unbranded fuel, as well as Chevron-, Shell-, Phillips 66-, Texaco- and Valero-branded products.

Source: Convenience Digital Resource Library, Technomic. For benchmarking purposes, store counts are year-end 2018.

Headquarters:Portland, Oregon
No. of Stores:37
Rank Last Year:170