I don't think anybody can say for certain running anything other than "normal" diesel is ok for these cars. There is a growing body of evidence that it doesn't seem to hurt anything, but asking if anybody knows for sure is a waste of time. There are dozens of WVO-related websites out there that could probably give you more information than this site; you should try posting your question to some of them.

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Keep everything as simple as possible-but no simpler--Albert Einstein