Doing some motor maintenance on Bella (V2620) this weekend I decided to take a look into the air intake of the Md6a. I was surprised to find that the filter and housing contained quite a bit of oil ( enough that it dripped out of the housing as I pulled it off). I am guessing that the filter has not been cleaned in a few years at the very least. Should I be worried? The motor has been very reliable for me and the oil level has been fine. I cleaned the mesh filter with diesel and plan to keep an eye on it. Just wondering if this is normal/manageable or an ominous sign... thanks, Ross