I don’t know what you’re doing but I have had 3 American sedans (1 mustang, 1 fusion, 1 Malibu) over the past 20 years and they all (2) made it over 200k miles when I sold them with my current one approaching that, nothing but regular maintenance and one time I had to replace shocks/struts on the ford fusion. 200k is when I generally pack it up and get a new car.