Cars 2 is a very different movie from the original Cars, and not in a good way.
Larry the Cable Guy gets top billing but the film seems to be more about Michael Caine‘s character than anything else. Owen Wilson again voices Lightning McQueen but every time he spoke it reminded me of his well-publicized personal troubles. Cars 2 embodies Pixar at its worst. While not nearly as anvilicious as WALL·E, it pushes the anti-oil agenda too hard, going so far as giving the line, “Once Big Oil, always Big Oil”, to the character least likely to say it. (The filmmakers appear unaware of the irony of such in a movie about gas- and diesel-burning vehicles.) Making the film fun to animate may have distracted from making the film fun to watch.
I recommend skipping Cars 2.