Roger, thanks for the response.  The experience that I related was also with
the XZX tires and at least one other has mentioned the XZX.  Apparently at
that time someone in the tires business had decided that the XZX were okay
for a Vanagon BUT I don't think it was Michelin. Or maybe it was and they
realized later they were wrong.  Although I couldn't get any info out of the
tire store I was dealing with, they were really anxious to get the XZXs off
my Vanagon when they saw them even though they had sold them to me several
years before. And they made a major adjustment in pricing at the time they
replaced them with MXTs.