Kenmore machines may have parts and manuals available on searspartsdirect.com -- have the correct model number usually a 3 digit a dot and the rest of the numbers (i.e., 158.xxxx or 385.xxxx1). You will see a list, and if you click on parts or attachments list and scroll down into the parts list, there should be a manual listed as either available or not.
As to the new machines, Euro-Pro or any other, if really cheap, then my personal feeling is that they are planned to not last for a long time -- which may account for the lack of oiling instructions in their manuals. The other possible reason 'may' be that like some Viking Husqvarna machines, the metal parts could be infused with oil and the heat from running them produces the oil needed as it runs. Somehow I doubt that could be the answer in an inexpensive machine. If a lot of the parts inside are plastic, then no oil is needed, and they will run until the plastic breaks, necessitating a trip to the repair shop.
Only use sewing machine oil which can be bought at any JoAnn's, Walmart, sew and vac, or sewing machine dealer. Never use household oil or the yellow/blue can of spray that is a water displacement solution which ultimately will gum up the works. You could use Tri-Flow Superior Lubricant.
Basic oiling procedure is to oil wherever metal parts meet (possible friction points) or slide past each other -- a drop or two usually. No grease needed on plastic gears. If you have an old machine with metal gears, then use sewing machine lube (grease) or Tri-Flow lube (can get it at a bicycle shop if no where else).
on Feb 17, 2009