In Cars, what is the name of Lightning McQueen's sponsor?

In Cars, Lightning McQueen’s sponsor is Rust-eze. Rust-eze is an automotive-rust-removal company whose orange-and-yellow branding appears on Lightning’s red race car. At the beginning of the film, Lightning is a rookie Piston Cup racer who dislikes the modest sponsor and dreams of joining the more prestigious Dinoco team.

His attitude toward Rust-eze reflects his early arrogance. Lightning believes that winning races is an individual achievement and treats his sponsors, crew, and competitors as obstacles to his ambitions. After he becomes stranded in Radiator Springs, however, his relationships with the town’s residents change his priorities. By the end of the story, he values loyalty and community more than simply securing the Dinoco deal.

Dinoco is a separate racing sponsor and is not Lightning’s original sponsor in Cars. The Piston Cup is the racing championship, not a company or sponsor, while Hudson Hornet is the name associated with Doc Hudson, Lightning’s mentor. In later Cars stories, sponsorship changes and partnerships evolve, but Rust-eze remains central to Lightning’s identity and career.