In Pixar's Cars 2, Allinol is presented as a biofuel.
Allinol is introduced as an environmentally friendly alternative fuel developed for the World Grand Prix. Sir Miles Axlerod promotes it as proof that cars can move away from petroleum-based fuels, and Lightning McQueen uses it during the international racing event.
The apparent environmental breakthrough is part of the film's central conspiracy. The lemons exploit weaknesses associated with Allinol and use the resulting disasters to discredit alternative fuels. Mater, Finn McMissile, and Holley Shiftwell gradually uncover the scheme behind the attacks.
Allinol is fictional and exists within the Cars universe; it is not the name of a real commercial fuel. The plot uses the idea of biofuel as a story device, combining environmental claims with espionage and corporate manipulation. Its name is also distinct from gasoline, which appears elsewhere in the franchise.