Works extremely well cutting filter oil and removing dirt. Leaves a slight film even after dry which to me is good indicating it is not too harsh and eating up the filter and filter glue. As always I wash once more with soap and water.
Wife gonna divorce me if I borrow any more Tupperware...do yourself a favor and get a Twin Air bucket for the perfect size container for oiling your filter. I keep my oil in it with lid on for storage.