5-Series (E12,E28, E34, E39, E60)Chat relating to the BMW 5-Series of all generations. Specific models include: BMW 518, BMW 520, BMW 520i, BMW 530i, BMW 528i, BMW 530i, BMW 518i, BMW 524d, BMW 525i, BMW 525e, BMW 528e, BMW 540i, BMW 535i, BMW 520d, BMW 525td, BMW 525d, BMW 530d, BMW 525i/xi, BMW 530i/xi. (BMW 5-Series Forum)
My mechanic sez that the oil in a K & N air filter will damage the foil (?) in my mass air sensor. I should not use that type of filter, it could ruin the big $$$ air sensor. The guy is fantastic< I believe him. Tell me what you guys think.
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