What's the deal with that? Do the car companies try to say that you are only licensing the car (just like software companies only sell you a license, not actually software you can own)?
The issue isn't with the manufacturers, but the state. I can't do it justice and the whole subject is a bit crackpotty, so you're going to have to read up on your own. For example - Rights vs Privileges by Michael Badnarik.
I say "common law fundamentalists" because there is a whole community of people who have ran with these ideas and believe that the key to restoring their rights is just asserting them harder. While it would be great if true, I don't subscribe to this view and think it's much healthier to view such legal reasoning as explanations of exactly how things decayed to the point we're at.