Love this machine! It is a very speedy machine, with 1500 stitches per minute, and so it requires frequent oiling. To oil, remove the bobbin case, and where the the two round metal pieces meet (where they rotate on each other) place a drop of oil. Because of it's high speed, this area requires frequent oiling, my repairman suggested every four bobbins. And, keep the dust out. Enjoy your purchase!