Quote:
Originally Posted by Wgosma
Internal VCG leak around spark plugs allowing oil to enter plug area is fairly common on many BMW motors as they accumulate miles/age. Only way to identify is remove valve cover and examine, see if oil is puddling around plug threads, etc.
this could be how oil is entering combustion chambers.
The oil is either leaking out or being burned in combustion chambers; if you cannot identify external leakage time to think oil is being burned- VCG internal leak, worn valves or piston oil scraper rings
Compression/leak down test may be in order here.
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Sorry I will clarify that oil was found around the exterior. No concerns were raised about the combustion chamber / spark plugs.