My Pacesetter ULT's use floppy disks and I like that as much as a re-writable card (which you can choose instead with PED Basic software).. Re oiling..no. Oil can break down the nylon parts in the machine. It is greased at the factory and supposed to last. My service dealer sometimes just wipes his finger with a bit of oil on it, underneath the bobbin case (when it is removed, of course.)