In Pixar's Cars, Lightning McQueen is associated with Rust-eze.
Rust-eze is a fictional brand of rusty car treatment owned by brothers Rusty and Dusty Rust-eze. Lightning starts the story as the team's rookie driver and initially dislikes the sponsor's image because he wants a prestigious Dinoco racing deal.
His relationship with Rust-eze changes as he becomes more connected to Radiator Springs. After the final Piston Cup race, Lightning chooses to stay with Rust-eze rather than immediately switch sponsors. The decision reflects his new appreciation for loyalty and the people who supported him.
Dinoco is the tempting sponsor Lightning pursues in the first film, but it is not his original team sponsor. Other fictional racing sponsors, including Mood Springs and Octane Gain, belong to different competitors. The sponsor name is therefore a specific character fact, not a general description of Lightning's car design.