Yes, racing is a sport.
No, racing is not a sport.
Yes, it is a sport. To be a race car driver you have to have a tremendous amount of endurance. In high speed races there can be several Gs on their body and they go through the strain that puts on a person for hours...with next to no breaks. So yes, car racing is a sport.
Here is the Official List of Sports from greater to lesser: Baseball Football Hockey Basketball Car Racing Rugby Golf Horse Racing Soccer
Not a sport in my opinion in just a racing category, and if racing is a sport, then it would be, yet i don't see it as one.