Aluminium Shuffler - please do everyone the courtesy of reading BALPA's April 22nd 2005 position on cabin air which when contaminated by toxic engine oil is either harmful or it isn't.
Then ask yourself whether it is more likely than not that BA, CAA etc can never, ever accept the 70 year old inconvenient evidence...
Proceedings of the BALPA Air Safety and Cabin Air Quality International Aero Industry Conference. Held at Imperial College, London (2005) - Aerotoxic Association
Many thanks and respectfully.