Has anyone ever found a healthy amount of oil in the bottom of the air box. I use a K&N filter and was checking to see if needed to be cleaned and noticed some oil at the bottom of the airbox. I know I put oil on the filter when first installed and the filter did seem to still have a fair amount of oil on it, but it took 3 napkin type paper towel to absorb it. Also does anyone know when re-appliying oil to the filter should it also be sprayed on the inside??