主要看你個人的感受。壇裏的男大俠們的車可能會last 4 ever。你的宏達10萬多mi，好像小有問題。老美平均新車開72個月。

In general, however, people don't really keep their cars forever. Research by R.L. Polk says that the average age of a modern vehicle is 11.4 years, while the average length of time drivers keep a new vehicle is 71.4 months -- around 6 years.