What was the name of the racing series visited internationally in Pixar’s Cars 2?

The international racing series visited in Pixar’s Cars 2 is the World Grand Prix.

Cars 2 sends Lightning McQueen and Mater outside the United States for races in Tokyo, Porto Corsa, and London. The event is organized by the billionaire oil magnate Miles Axlerod, who presents it as a competition designed to promote Allinol, a new alternative fuel.

The World Grand Prix gives the sequel a broader spy-adventure structure than the original Cars. Mater becomes involved with British agents Finn McMissile and Holley Shiftwell after being mistaken for an American spy. The race itself is connected to a conspiracy involving modified weapons and the manipulation of Allinol’s public image.

The Piston Cup is a separate fictional American stock-car championship associated with McQueen and the first film. It should not be used as the answer here. Cars 2 was released in 2011 and was directed by John Lasseter and Brad Lewis.