So again Tye you over-react with nastiness when confronted with an expert. (I mean, a real expert). You are gradually, inexorably, 'painting yourself into a corner'. A process any number of us can't wait to reach its inevitable conclusion..
But back at the oil question. Some of the confusion with oils can be clarified when it is factored in that Ducati - like many manufacturers - have done a deal with suppliers.
In the case of Ducati, with some links to Ferrari, they swapped from Agip to Shell some years ago. When the F1 cars did a similar thing.
So there is a fair bit of 'smoke and mirrors' in this discussion. And probably an intent on the part of oil companies to keep us in blissful ignorance..
I can say that I have run the Motul 5100 15/40 since Day One, and that my engine was in excellent condition when I pulled it down at 76,000 kms.
But the issue with the wet clutch models is something else again. With these I tend to use a motorcycle-specific oil, which should be designed to cope with the needs of a bath clutch.
But it is pretty well impossible to find an oil that is ideal for the needs of the engine, and the very different needs of the gearbox, plus cope with the function of a wet clutch. This is a compromise at best.
The older motorcyclists will remember the days when we had three separate oils to change on our bikes. Plus the dry-sump British bikes had to be drained from both the sump and the oil tank, Aprilia-style.
But we liked a challenge back then..
