When on location quite some time ago, I had a person ask me; "You're not making a tire commercial, are you?" Well, no. I wasn't. But I wasn't making a wheel commercial either. My desire was to make the car as a whole look as good as it possibly could. The best way to do that varies from car to car, and also according to the type of attitude you're trying to portray in the shot. And that's why, now that you know the rule, you can ignore it, as long as you're thinking about your reasoning.
As I've moved through the rarified air of photographing the automotive high end, I am continually amazed at the parallels between it and my previous life in the music industry. It makes me believe that those parallels exist in any profession. For example, a musician who knows no music theory will have a much harder time creating a meaningful song, usually struggling to even come up with much that's listenable, and if they do, it's often pure luck. But once they know the theory, they are free to ignore those rules if they feel it better serves their vision. That knowledgeable blindness tends to work out very well when trying to create something new, unique, and interesting. One might think that the same result could come out of a musician who knew no theory, but it just doesn't happen that way.
You should feel free to have that same attitude anytime you learn a "rule" about your creative profession or hobby, and photography is no different. As soon as you learn the rule, start thinking of creative reasons to ignore it, and you'll be much better off stylistically.
In fact, that's one of the tricks I use during a shoot. I pretend the car is a human model on the runway, and that quickly tells me what kind of shots to use.
Now picture the Camaro or the Corvette being posed in the same way as the Shelby Mustang. The attitudes portrayed would be completely lost if the wheels had been turned, and both shots would be ruined. Yet it's perfect for the Shelby.
So keeping all that in mind, don't be afraid to deliberately break any rule - your shots will be better for it!