Liberty Oil, the Best 100% Synthetic Oil for Lubricating All Moving Parts of Your Cuckoo Clocks Moving Parts. 100% Synthetic oil that will reduce friction between any moving surface. Use this to replace petroleum based or spray lubricants. Safe to use on plastics and painted surfaces. Comes with a 60 day no questions asked return policy. If you are not 100% happy with your purchase I will refund your money. Comes with a medical grade 1 1/2 inch long stainless steel needle tip applicator for precision oiling with no mess.