The outside edge of the front driver's side tire is wearing quicker than the inside, and very different from the passenger side wear pattern. Alignment checks OK. My wife's W126 does this as well, so I started looking at 80's W123/W126s whenever I've seen them parked. It seems that all the ones I've examined have this trait. More pronounced on custom wheeled cars. What causes it?

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85 300TD FED-Daily
84 300SD-Wife's
86 XJS-Sunday
66 GMC-Work- Given to my stepson
83 BMW Airhead- Given to my stepson