Your original error code list include misfire codes for cylinders 5,6,7,and 8. Are these the cylinders that had the oil on the plugs and now aren't firing at all? Have you checked the coil ground straps etc.?
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Wayne
2005 BMW X5 3.0d (b 02/05)
2001 BMW F650GS Dakar (b 06/01)
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