Big D Oil Co.

Everyday-value prices and customer service give Big D Oil stores a competitive advantage over competitors, the company says. The chain’s foodservice program includes pizza, burritos, sandwiches and roller-grill items. Some units have quick-service concepts, such as Papa John’s and Domino’s. The company also operates 10 car washes in South Dakota and Wyoming, and one Express Lube location, which offers full-service oil changes and other services.

Source: Convenience Digital Resource Library, Technomic. For benchmarking purposes, store counts are year-end 2017.