Here is a label found in an early Aeolian player; the exact
wording:

    IMPORTANT

    To insure the proper working and running gear, all
  metal working bearings should be oiled every week or two,
  depending upon what the amount of use the instrument is
  put to.  A good sperm oil should be used for this purpose.
 
    Care should be taken that no oil or grease is used on the
  motor slide valves.  It will be necessary, however, to oil
  the small wooden brake shoe resting on the friction wheel,
  otherwise this shoe is likely to become gummed up and exert
  an undue drag on the wheel, which will naturally retard the
  speed of the motor.

Bill Chapman - in cloudy La Quinta, California