I have the 160 and just checked the manual. It says "Put 1 drop of sewing machine oil on the hook race as indicated by the arrows (A,B)" and then has a diagram. It is on Page 50 of the manual under Caring For Your Machine. It also says "Singer brand sewing machine oil is suggested. DO NOT use "all purpose" oil as it is not suited for sewing machine lubrication".
Singer brand sm oil is available at Hancocks, JoAnne's, etc.
Since this machine is so new, I would think that it would not need oiling yet. I haven't found where it says "oil often". Your DIL might also check the Singer site to see if there are any further instructions.
Last edited by Nanamoms; 06-10-2012 at 08:26 AM.