BROTHER XR 65 OILING
Sewing machines like the XR-65 should not get oiled by their user. They have sealed bearings. If you suspect a problem with the bearings or other moving parts, you should take the sewing machine to a good sewing machine repair person.
Generally, when the manual gives no lubrication directions, don't add oil. Electronic sewing machines can easily be damaged if excess oil gets into the wrong part of the machine.
I hope this helps.