Motorrad will publish an oil recommendation and the dealers will not follow it.
Motorrad will sell you oil that is exactly the same as the Castrol bottle but you will pay as high as 3 times more for it.
When the local dealer runs out, they will sell you the exact same oil that the local Wal-Mart does but charge you 25% more for it.
Motorrad will sell you a bike with an owners manual that says you must use a certain oil and the dealer will never have that oil in stock nor use it.
Motorrad will often say one thing and the local dealer will do another.
People will get high mileage out of motors lubed with synthetic oil and people will get high mileage out of motors lubed with dead dinosaurs.
A true and lasting peace in the Middle East is more likely than even a general consensus on oil threads.