In Pixar’s Cars 2, the fuel promoted by the World Grand Prix is Allinol.
Allinol is presented as an alternative fuel intended to power the international racing event. Sir Miles Axlerod, the event’s organizer, promotes it as a clean and advanced fuel for the participating cars.
The fuel becomes central to the film’s espionage plot. The secret plan involving Allinol causes several racers to malfunction, leading Mater and international agents to investigate what is really happening behind the World Grand Prix.
Allinol should not be confused with Rust-eze, which sponsors Lightning McQueen, or Dinoco, a separate racing and fuel brand in the Cars universe. Fillmore’s Organic Fuel is also a different fictional fuel associated with the hippie van in Radiator Springs.