Bird,
You are probably right about the maintenance issue. The average Joe wasn't ready for the maintenance required for a diesel.
The only complaints my bro had were changing the oil and filters, batteries, and the biggest was the starter. Other than that he was very happy with it.
Trade in. Yuck!! His Diesel Regal was in near showroom condition. It was a beauty, Black with a red interior. Good fuel economy, etc. He parked in front of his house for the evening and a guy sideswiped the car with a pickup. Totaled it! Just an unfortunate accident, the pickup driver felt really bad. Anywho, bro' turned it into the insurance company. They looked it up in the books. Since it was in good shape, it was worth $5k +. Oh, what.... you say it's a diesel. Sorry, $2800!! Boy, was bro' peaved. Took it to the state for arbititration and was told. Sorry, too bad. That's the blue book value. Can't help you. Damn shame. But, what can you do.
Terry