To answer my own question from "http://www.frenergy.com.au/pages/FAQs.html":

Q: I use Molybdenum DiSulphide compound as a friction proofing in all my engines, Will Powermag Oil Filter Magnet units draw the Moly from the oil??I am not sure if Moly is magnetically attracted.
A: Paramagnetic metals have a small and positive susceptibility to magnetic fields. These materials are slightly attracted by a magnetic field and the material does not retain the magnetic properties when the external field is removed. Paramagnetic properties are due to the presence of some unpaired electrons, and from the realignment of the electron orbits caused by the external magnetic field. Paramagnetic materials include magnesium, molybdenum, lithium, and tantalum. So answer, only slightly attracted
Not much of answer, but it gets closer.