Hello! My name is Adrian, I own a 1992 Subaru Libero powered by a EF12 engine with carburetor. I have a question, there's something that's been bugging me for quite a while now. I'm new to this van so I'm not familiar to ALL it's bits and bobs. I recently replaced the air filter element. The old one was greasy, oily and really smelly. The information sticker on the engine compartment cover says that the air filter is a wet type filter. Should I oil it or should I leave it be? Please answer this question for me, it's bugging the hell out of me. Thank you!