Nigel Cole mentioned one scene with Nivola inspecting a taco stand and the owner (played by one of the production guys) shouting obscenities at him that was filmed as an opening, but it set the wrong tone for the opening of the film, so it got cut.
They were originally going to have Polident as the wrap for the car, with a big set of teeth on the roof, but Polident pulled out as they didn't want to have their product made fun of. Ultimately, Sugar Foods Corporation agreed to wrap a 2008 Chrysler PT Cruiser Limited with a giant advertisement for their Sweet'N Low brand.
The cities which either appear on screen, or that Nat and Ritchie say they are stopping in, but which they do not actually film in, and in order are: Altoona, Pennsylvania; Bloomington, Indiana; Tulsa, Oklahoma; Elk City, Oklahoma; Amarillo, Texas; and Las Vegas, Nevada.
The picture on the poster, with Christopher Walken, Alessandro Nivola, and Sharon Stone in the front seat of a car, was not actually a scene in the film, and could not have been taken in a Chrysler PT Cruiser, since the front of that vehicle has two bucket seats.