Originally Posted by Oranoco

Too be honest I woud be wary mate as the oil comes away from the filter and contaminates the MAF. I often had issues on both my last couple of Audi's with the revs dropping off and guaranteed a clean up with some electrical contact cleaner on the MAF wire resolved the problem. When I fitted the cone filter to my AEB car I spent the first couple of months popping the filter off and cleaning the MAF as a precaustion until the excess oil had disipated