A chain that capitalizes on tourist attractions across its marketing territory, Big D Oil Co. operates Big D stores, all located in South Dakota or Wyoming. One main feature on its corporate website is a travel attractions button to serve as a guide for travelers about destinations such as Mount Rushmore, Black Hills and annual Sturgis Motorcycle Rally. Stores vary in size and design, with all branded Big D. In addition to Exxon, Mobil and Sinclair-branded fuel, the chain offers Big D gift cards in $10, $25 and $50 denominations. Foodservice encompasses sandwiches, burritos, pizza and roller-grill items, with some locations co-branded with Domino's.

Ten Big D locations offer car washes, with some offering touchless and others soft touch equipment. The chain offers single and multiple wash packages with special pricing and promotions, all varying by location. Packages run from Bronze to Silver (value added wash) to Gold (premium wash). Touting service in 10 minutes or less, The Big D Express Lube touts premier Pennzoil and Shell oil and filters and an option to upgrade to semi or full synthetic oils. For benchmarking purposes, store counts are year-end 2019.

No. of Stores:40
Rank Last Year:154