In Pixar's Cars 2, which international spy car works with Mater?

In Pixar's Cars 2, Mater works with the British spy car Finn McMissile.

Finn recruits Mater after mistaking him for an American agent. Mater’s unusual behavior and accidental observations lead Finn to believe that the tow truck has valuable intelligence, even though Mater does not understand the espionage operation at first.

Finn is modeled after classic British spy vehicles and serves as an experienced field agent. He investigates a conspiracy connected to the World Grand Prix, an alternative fuel called Allinol, and a group of criminals led by Professor Zündapp.

A frequent mix-up is naming Holley Shiftwell as the spy partner in the question. Holley is also a British agent and eventually works closely with Mater, but Finn McMissile is the veteran spy car who first brings him into the mission.