how exactly do you 'add' the air filter oil?
spray on is good, but you get more use out of a bottle, it simple with a bottle, get yourself a old plastic shopping bag, put a couple of drops into the bag, throw you air filter in and the massage the air filter (with your hands on the outside of the bag obviously)
i might be weird
in fact i'll garentee i'm weird
i have tried used and abused all oils and and methods of cleaning
i now use no-toil filter oil and no-toil filter cleaner and i tell you there is no other way to clean your filters
the no- toil filter cleaner works on most oils even though the package says it doesn't and it will bring your filter back to brand new in literally seconds i have never seen anything like it
and as i say i've tried it all even other brands of cleaner and oils that claim to do the same thing
hmm good plug for a serco product but hey i swear by it