What was McDonald's original service-system slogan associated with its 1948 restaurant redesign?

McDonald's original service-system slogan was “Speedee Service System.” The McDonald brothers introduced the system after redesigning their San Bernardino restaurant in 1948 around a limited menu, standardized preparation, and rapid customer service.

The system was a major part of the restaurant's early identity. Instead of relying on carhops and a broad menu, the redesigned operation emphasized hamburgers, fries, drinks, and a kitchen organized for speed and consistency.

The Speedee name also influenced the chain's first mascot, who was drawn as a hamburger-headed chef. This linked the promise of quick service to a memorable visual character and helped distinguish the business in early promotional materials.

The system was an important predecessor to the modern fast-food model, but it was not the same thing as McDonald's later corporate slogan campaigns. Lines such as “You Deserve a Break Today” and “I'm Lovin' It” promoted the brand emotionally, whereas Speedee Service System described the operating concept itself.