Wikipedia
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, and the "Sh" that the name begins with, in various marketing efforts. These include the Sheetz loadable gift card, the "Z" card; the Sheetz chicken wings, known and marketed as "Shwingz"; the Sheetz breakfast sandwich, known and marketed as "Shmuffinz"; and their "Nachoz."