I completed a Phd at Stanford in Tribology, so here is my story and I am sticking to it.
Most important aspect to maintain in the Busa engine is to maintain hydrodynamic lubrication. Suzuki uses a coating in their cylinders which will produce different values as measured on the Stribeck curve when compared to the same lubricant as used on a BMW, or something else for instance. So, if we want to split hairs, the engine life on a specific engine with a specific lubricant has many variables and the oil which may be perfect for a Suzuki, may not be perfect for a Yamaha.
Under elasto hydrodynamic lubrication, the logorithmic transition diagram is really the only effective method to investigate how lubricant properties, additives and viscosity react with different grades of metals, alloys and coatings. Any data beyond this method is pure speculation, or clever marketing.
Most manufacturers have adequite lubricity, oxidation stability and maximum/minimum operating temperatures. What is important is how the contact with polymers and elostomers react with wear surfaces.
If you read this far, good gas for you, as I don't really have a Phd and I made all of this up. You may not have your click back.