The air has to travel a much further distance from the Revo cone filter to the MAF compared to the K and N panel filter. So maybe the distance is just too far for the oil to travel with the Revo?
Your in the wrong section bud this is for 2007-2012 a3/S3 8P chassis people over at at 8v will be able to help you as its completely different engine since you 2013/4+
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