by vintage on Sat Sep 29, 2012 1:07 pm
I have an old Brother Industrial Serger (not sure how old would guess 1960s, looks like the ones in sweat shops in the movies) I have the manual and it says it needs " pure mineral oil with a viscosity of 140 at 30 deg. C" I have called brother and they have not been helpful (they coudnt even find the manual) I know that most sewing machine oils do not have a viscosity of 140 (maybe car motor oil?) if any one can help me with what I should use that would be great!!