When I was a kid in the 1950’s, I read a series of ‘car books’ about a young man who became interested in sports car racing. I remember that the name of the car manufacturer was ‘black’ something and as an advertising promotion, they once drove one of the cars many, many miles (20,000+?) without an oil change, and then entered the car in a sports car race.
Any of this sound familiar to anyone?
This is a series of books by Patrick O’Connor about cars. The Black Tiger at Indianapolis, The Black Tiger at LeMans etc.
This sounds like the Black Tiger series by Patrick O’Connor.