Rust-eze is the fictional sponsor displayed on Lightning McQueen’s body in Pixar’s Cars.
Rust-eze is presented as a company selling a product intended to help with rust. Its logo appears prominently on Lightning’s red body when he begins the first film as a rookie racer. The sponsorship is important because Lightning initially wants to leave Rust-eze for the more prestigious Dinoco team.
After Lightning becomes stranded in Radiator Springs, Rust-eze’s owners, Rusty and Dusty Rust-eze, remain connected to his racing career. The sponsor continues to appear throughout the franchise, even as Lightning’s status and relationships change.
Dinoco is the most common mix-up. Dinoco is a separate, highly desirable sponsor associated with The King in the first film and later with Lightning. Mood Springs and Octane Gain are also fictional racing sponsors, but neither is Lightning’s primary sponsor.