Tri-Flowed it up yesterday afternoon. The Tri-Flow dissolved some of the old oil and freed the machine up a lot.
Last night I smelled a horrid rancid odor in the house. Traced it to the machine. Whatever the old oil is, it reaks. This one will need much cleaning and more Tri-Flow.
I haven't tried any decorative stitches yet, got more freeing up to do.
Joe