What my Dad (an ex-rally driver) doesn't know about motor-racing (all forms) doesn't exist. He's watched all sorts of documentaries and films over the years and had to make do with the action presented to him.....
I bought the Rush DVD for him amd we watched it together. It had him, literally, on the edge of his seat. At the finish he sat back in his chair and declared it to have been the finest piece of sport film-making he had ever seen.
In fact, instead of watching his "......rotten old cowboy films" - my mother's considered opinion, he is more often than not to be found hurtling round the Nurburgring with Hunt and Lauda.