If Your Car was Open Source
If your car was open source:
You would tell everyone it was free, but ignore the total cost of ownership.
When it needed fixing, you would rely on the generosity of others to help you fix it by self-diagnosing the problem through the use of various listservs and discussion boards.
You would have to paint it as it came very white and gray from the "dealership."
It might have 3, 4, or 5 wheels as the manufacturers argued about standards.
Your car would always be under construction and never really finished.
Recalls, well, you're on your own....
Optional features may or may not work and might be unstable and make your car perform poorly, but, hey, at least they were "free."
Owners would support their cars with self-righteousness and with indignant and incredulous comments directed at those who have chosen a different direction for their transportation needs.
Your car's radio would be tuned to a talk show bashing Microsoft as you pulled into your driveway excited about firing up your Macintosh....
Sorry about the Mac thing.