Jb - you make interesting points. My Lexus is over 20 years newer than the SD so I had not really considered that. Short of the fact that my freon has leaked out, there is absolutely nothing wrong with the SD now; whether I will be able to say that about the Lexus 25 years from now, I do not know.

The one thing I will say about the Lexus is that it is too complicated for me to work on; that is one reason I will probably never sell the SD.