Allinol is the fictional fuel at the center of Pixar's Cars 2.
Allinol is presented as an alternative fuel used in the World Grand Prix. Sir Miles Axlerod promotes it as a clean, revolutionary product, and the race becomes a major showcase for the fuel's supposed benefits.
The plot reveals that the fuel is dangerous when exposed to electromagnetic pulses. Professor Zündapp and his allies use that weakness as part of a scheme involving the racers and the international broadcast of the World Grand Prix. Mater discovers the conspiracy after becoming entangled with British agents.
Allinol is not the same as Dinoco or Rust-eze. Dinoco is an important racing sponsor and company in the Cars universe, while Rust-eze is the sponsor associated with Lightning McQueen in the first and third films. Allinol exists specifically as Cars 2's fictional fuel and espionage plot device.