In Pixar’s Cars, Dinoco is the fictional company sponsoring the Piston Cup.
Dinoco is presented as a major petroleum brand with a distinctive blue-and-orange identity. Its famous race car, The King, carries the number 43 and is one of the sport’s most respected veterans. Winning Dinoco sponsorship is a major goal for racers in the film.
Lightning McQueen begins the story sponsored by Rust-eze, a fictional bumper-ointment company. He hopes that winning the Piston Cup will earn him the chance to replace The King as Dinoco’s sponsored racer. This ambition helps establish McQueen’s early focus on fame and commercial success.
Dinoco also appears in other Pixar productions, including Toy Story, where it is associated with a gas station. The brand is therefore a recurring Pixar in-joke rather than a real petroleum company. Its appearance in Cars is tied specifically to the Piston Cup racing world.