I happened to get into conversation with a retired watchmaker this morning at 7 Eleven. Eventually I got the opportunity to ask ; what is the best oil for movements". With sharpness he says "you should absolutely not have anything in the movement. Clean and neat works best in the long run. He also says, ”oil gets old and tough after at most 5-6 years and then slows down the movement. If you have a more exclusive brand, a service costs a lot these days. The industry's invention for more business." End quote.. What are we to think about this? Do we have any watchmakers in the ranks who would like to comment on his statement?