2011 oil in airbox???

Seems everytime I change airfilters in my 2011 im getting a little bit of oil in the airbox is this normal I kno theres a tube that connects to the box but idk if there is suppose to be oil in there everytime a filter change is made?

2 things could be happening. 1- you're over oiling the foam filter. This would cause the engine vacuum to draw oil out of valve cover thru the vent tube and saturate the filter with engine oil.

2- you're not squeezing enough oil off the filter seal and when you tighten the filter bolt it is squeezing excess oil out of seal and dripping off into airbox.

Is it filter oil or engine oil?

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