Magfarm51 and DonG summarize the two points of view that predictably show up whenever oil additives are discussed. One point of view is that the major lubrication product manufacturers, with their labratories and staffs of scientists conducting ongoing research, offer the best oils and greases that exist.
The other point of view is that better products exist but the majors are withholding them but they are available as additives. Stuff like STP, Marvel Mystery Oil, etc.
I am not a lubrication engineer but I have read the results of generally accepted lubrication testing procedures for evaluating the effectiveness of lubricants. The test I'm familiar with is two steel balls rotating in opposite directions and forced together under pressure while being lubricated with the product being tested. The wear on the balls is then measured.
I have observed the results of various oils used by myself and others in 2-stroke premix fuel, mixed at various ratios, because I was an off road motorcycle racer in AMA competition riding 2-strokes built by Bultaco, Suzuki, Husqvarna, Honda and Yamaha. The results of using relatively inexpensive oils from the major manufacturers to expensive oils from the "Microbrewers" are intersting.
This is another one of those science versus faith arguments that will probably never be resolved but is interesting to listen to.
