Finally changed the M1 EP 5W30 in the xB in my sig, 9995 miles, roughly a year. This is a tiny filter, but there was very little in the pleats, and a small amount of powdered carbon is visible in the bottom. Went back with EP again & an oversize XG3600, may make that 15K run if the UOA comes back OK. Not sure that an M-80 would have blown up the element, I bent 2 small screwdrivers taking it apart to get the screen out (posted elsewhere here).