A bit of information first:
2012 R1200GS - 6.5K miles - purchased used with 2.5K miles. At 3K mile I changed the oil, oil filter, transmission fluid, and final drive, primarily to replace all the drain plugs with "DIMPLE" plugs. During the process, I found the dealer overfilled the final drive, the drain totaled (215cc). I refilled to 180cc. Over the next 3K miles the engine oil has dropped less than 25% of the sight glass. I had the BMW dealer performed the 6K mile service recently, but not the oil, oil filter change, I did that myself.
Right from the onset of my acquiring the 12GS, on occasions when I'd come to a stop, I could detect the odor of burnt oil.
WHAT I'VE DONE"
I obviously monitored the oil consumption and IMO the drop in the sight glass was NORMAL. I examined the drain plugs, oil filter, bone dry. I examined the engine the best I could and for the life of me cannot find anything that would point to an oil leak.
I searched some forums, and found a threat about the "cam tensioner bolt" not being torqued properly from the factory. I looked at the bolt with a light and mirror, and found no evidence of weeping oil.
I called the BMW dealer and asked about the cam tensioner bolt being the culprit, he said, in his three years, he has only seen 2 units that the cam tensioner bolt was not torqued properly.
If the cam tensioner bolt was not properly torqued, and the oil smell is coming from it, wouldn't I see some visible sign of weeping?
Based on the aforementioned information, what other possible avenue or areas can you advise I look.
Thanks in advance.