Bill Clinton, Forty-Second President of the United States. Public Domain Image from NARA
1 Total vehicle miles driven by teen drivers have plummeted, not only because a smaller share of them are driving but also because miles per young driver have also declined.  In 1990, each driver aged 16 to 19 drove an average of 8,485 miles per year.
Cars and Automobiles. First let me reassure you it has nothing to do with either of the Presidents Bush, both of which have already been replaced. For the year of manufacture, the worn brakes, and the bushing, I'd expect the car to have travelled about ten times that amount. 14,400 miles is 1600 miles per each of nine years, or only 30 miles per week. Seems unlikely to me; particularly considering the other two items you mention.