Answer:
So, the original thesis statement of "The Joys of an Old Car" is In fact, my “antique” has opened my eyes to the advantages of owning an old car: economy, reliability, and familiarity and you would like to rewrite it to include a plan of development.
That really depends on what you will be writing about in the rest of the text.
You could write something like:
In fact, my “antique” has opened my eyes to the advantages of owning an old car: economy, which makes it a much more worthwhile investment for me, reliability, because I know I can trust it, and familiarity, because I'm already used to having this car.
