I did machine Knitting for many years. We found the lubricating oil to use is Gun Oil. It will not gum up like sewing machine oil. specially when the machine is not used very often. It is very important to only buy gun oil without any Solvent. Hoppe's has a lubricating gun oil without solvents. I used to buy mine from Passap in Canada. Just google Passap. I have been using it on all my Sewing machines including my Singer Featherweight.The machines run nice and smooth and there is no oil dripping.