Your photo's seem to show the air trunking pipe between the turbo/ intercooler/ inlet.
It is normal for turbo's to pass some oil past their bearings into this area & for the oil to drip from the odd joint. The amount in the picture seems small & wouldn't account for the 1/8th engine oil. You need to check carefully the amount of oil being used over a recorded distance. Wipe up the oil spill & see if it re-occures.
If it is passing the amount you indicate through the turbo be very carefull, as the engine could run away on this oil & destroy itself
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