Does anyone know if you can clean oil off a K&N filter after it's been in a SD? My regular air filter gets a nice coating of oil fairly quickly. If you can get engine oil out of a K&N filter, the purchase price might be worth it.

Also, is there anyway to upgrade the oil separator? Mine doesn't seem to do the best job at keeping oil out of the filter housing.

Last year I built my own custom air intake, but the oil separator I made leaked too much. It was nice hearing the turbo, though.