I recall reading an essay by an anthropologist years ago. He was studying a group of people who used some kind of divining mechanism to make decisions. It was totally irrational compared to our standard 'rational' decisionmaking procedures. He (perhaps it was Pritchard-Owens) decided to give the divining method a try. His conclusion was that the outcomes were no better or worse than his standard 'rational' procedures.
Based on that, I say follow the fortune cookie. (Unless it said kill your firstborn or something like that)

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1977 300d 70k--sold 08
1985 300TD 185k+
1984 307d 126k--sold 8/03
1985 409d 65k--sold 06
1984 300SD 315k--daughter's car
1979 300SD 122k--sold 2/11
1999 Fuso FG Expedition Camper
1993 GMC Sierra 6.5 TD 4x4
1982 Bluebird Wanderlodge CAT 3208--Sold 2/13