It was rural Upper Michigan, and IIRC after the 70 Bel Air they bought a downsized Olds 88. 7-8 years was their average car change interval, at least for the sedan. --- Post updated --- So the '89 Touring Sedan owner responded with an essay... "The B bodies (Bonneville) were somewhat different from the C bodies (Olds Touring Sedan) in size and configuration, although they were certainly mechanically similar. What I loved about my Touring Sedan, at least at the time, was the fact that it was front-wheel drive (great for the severe winters where I was living, in Upper Michigan), and had a lot of interior space. It was a pretty small car, but it did not look awkward, and the vertical rear window allowed the rear seats to be situated for maximum space utilization. I often tell people that I like large cars, but that’s not exactly true. I like cars with a lot of interior room, both in the front and rear seats, but I don’t care how small the exterior is, really. There are a lot of advantages to a smaller exterior, and I would now never want to go back to the monstrous sedans of the 1960’s and early 1970’s, at least as my daily driver. They’re fun for occasional cruising, but that’s about it. That Touring Sedan also had some of the most comfortable seating I have ever found in a car. It was also the first American car I’ve ever encountered with rear headrests, which, honestly, were the first features that sparked my interest in the car. My big complaint was that it could have used more engine power, but that was true of almost every car of the era." And it was better than the 1989 Cadillacs, because: "It had suspension designed more for handling than comfort, the seats were more supportive and adjustable, and although it had what I thought was far better handling and interior comfort, it was significantly less expensive."