Good question to ask my friend's little brother. He works in LA for one of the companies that supply cars and drivers (including stunt drivers) to all the TV and movie production companies. He is a stunt driver/aspiring actor. He used to manage Richard Petty's race track operations in Florida.

My guess would be that he will tell me that beyond manufacturer, in cases of corporate sponsorship of specific productions (Ford, Chevy, Toyota, GM, etc.), specifics are not usually required regarding car models.

The bad news is I doubt I will see him again until maybe next Christmas!