Question to speedrs4: Do you have experience with K&N air filters for the 10 Zyl. (Bj. 02/2015)? Supposedly the oil should settle in the intake track, e.g. at the air mass meter and then distort the internal measured values. In other words: too little air mass = less injection = less power! I can’t understand this. Over the long term, much more ÖL/oil mist should be added to the test rack via the crankcase ventilation.