not sure, got pics? it should say air filter oil.
you have 2 filters, an inner and an outer, take the inner filter and put a lil bit of oil in a ziplock bag, drop the Inner filter into it< after its cleaned ofcourse> and work the oil thruout the filter so its pretty evenly spread. install the now clean and properly oiled airfilter on the the Freshly Cleaned Air FIlter Housing ( yes be sure it is good an clean) and then re install the freshly cleaned OUTTER filter over the prefilter. Keep a good eye on it.
i will also take wheel bearing greese and put a thin layer on the mating ends of both the pre and outter air filters to help ensure the air flows Thru the filters, not next to the and the housing.
hth
T