Allinol is the secret alternative fuel at the center of Pixar's Cars 2.
In Cars 2, oil magnate Miles Axlerod promotes Allinol during the World Grand Prix, presenting it as a clean fuel that can replace petroleum. The international race is designed to advertise the product and demonstrate that it works in high-performance cars.
The film's villains secretly manipulate the fuel and use electromagnetic technology to cause cars running on it to malfunction. Their plan is to make the public reject alternative fuels, protecting the value of traditional oil. The plot turns the World Grand Prix into both a sporting event and an international espionage operation.
Allinol is fictional. It should not be confused with Dinoco, the racing sponsor from the first film, or Rust-eze, Lightning McQueen's sponsor. Octane Gain is another fictional brand in the Cars universe, but it is not the alternative fuel marketed in Cars 2.