In Pixar's Cars 2, which fictional competition takes Lightning McQueen around the world?

In Pixar's Cars 2, Lightning McQueen competes in the World Grand Prix.

The World Grand Prix is a three-race international event created by oil magnate Miles Axlerod. Its races take place in Tokyo, Porto Corsa, and London, giving the sequel a globe-spanning setting very different from the first film's American road-trip story.

Lightning enters to represent American racing, while Mater becomes involved in an espionage plot after being mistaken for a secret agent. The competition's use of alternative fuel is central to the film's mystery.

The World Grand Prix is not the Piston Cup. The Piston Cup is the domestic championship associated with the first Cars film and Lightning's career in American stock-car racing.