trumpet

Hi guys, I opened the bonnet to check the oil today and although the level was fine, i noticed oil on the trumpet of my split r. Just wondered if this was normal and if anyone else had this? Cheers

Just finished smoothing the airbox on my LC and was hoping someone has also done this on an 03 plate Cupra, because... Can you leave off the trumpet shaped opening that clips in place inside the airbox by the opening to the MAF senser?