Quote:
Originally Posted by diorodriguez
you may have a clogged crankcase ventilation system, the system is getting clogged with oil sludge and moisture . The oil separator and hoses commonly gets clogged due to the long time between the BMW recommended intervals for oil changes plus the build up of moisture due to normal condensation.This is a very common issue and the typical symptom is increased oil usage.The cure is to disassemble all of the hoses and replace the oil separator . THe oil separator and the hoses are found under the intake manifold. so manifold must be removed for service.
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Don't listen to this guy the oil separator is part of the cylinder head cover. And if the two diaphrams aren't torn and the vehicle is not leaking oil. I would guess the valve guide seals are wornout. Have your dealer investigate. If your a good customer they will cover the repair.