I've heard that marvel mystery oil is just like after run in oil.
I don't think you want to use MMO as an air filter oil. Its' too runny. You want something thick and gooey. I use some 2 stroke air filter oil bought from the local cycle shop.
The greatest trick the devil pulled was convincing the world he didn't exist...
I always thought I had a pretty good imagination, but it turned out to be just my imagination.
NOT a member of Team Terribles!