I also think that some definition of car would help. We now have trucks, buses, airport vehicles, construction vehicles, cranes, and all manner of miscellaneous vehicles. Maybe some of the vehicles that are more obscure should be deleted unless they have a significant part in the movie. For example: The crane in Terminator 3 is significant because it is used in a chase, but the same vehicle in a background shot (say a main car passes a construction site) should not be included.