[mikesride]

I've had this happen on an old Fiat once... the cap end wrench just ended collapsing the filter (it twisted....like wringing out your chamois) Cold chisel on the seem didn't work either, just started cutting thru....ended up tearing the body of the filter off and chiseling the actual threads off the housing...hope you don't have to go that far. those threads would be pretty tough to get to.