Western Oil operates the Petro-Mart convenience-store chain. The company prides itself on its bright and clean stores and focuses on attracting consumers with items such as nacho bars, salads and special pricing on fountain beverages. At stores with the chain's PM Cafe, the company offers a variety of sandwiches, wraps and pizzas, made to order from ordering kiosks. A private, family-operated company, Western Oil also oversees a fuel transportation business and two travel centers. Its fuel brands include BP, ConocoPhillips and Phillips 66.

For benchmarking purposes, store counts are year-end 2019.

Headquarters:Earth City, Missouri
No. of Stores:48
Rank Last Year:134