So, if you have gummy oil, your idea is to put more oil on it? Wouldn't it be better to remove the old stuff? I'd like to know how YOU would remove the old stuff? I know some people stress about WD-40, but if you'd try it, you'd know how well it works. It breaks-up the old oil, not covers it up. We've had machines come in with froze-up parts that another tech said wasn't repairable. We just remove the old stuff with WD-40, and our sew-er is back in business. Sorry to upset the apple cart.