Sheetz
Sheetz, Inc. is a chain of gas stations/convenience stores owned by the Sheetz family. Its headquarters are in Altoona, Pennsylvania. Stores are located in Maryland, North Carolina, Ohio, Pennsylvania, Virginia, and West Virginia.
Sheetz has long employed the "Z" that the name ends with in various marketing efforts. These include the Sheetz loadable gift card, the "Z" card; the Sheetz breakfast sandwich, known and marketed as "Shmuffinz"; and their "Nachoz."
Read more about Sheetz: History, Food Service, Fuel, Awards, Use of Trans Fats