Perhaps head over to bobistheoilguy.com and read up on the basics of motor oil. I'm not saying that to be flippant, just that its easy to take things at face value when there's more to it than that. A rough parallel can be found the car world. When Subaru intro'd the next evolution of their 2.5 boxer engine in 2011 they specified 0W20 full synthetic oil, which by the way is redundant because all 0W oil is synthetic because conventional cannot reach the pour point spec to be labeled 0W. Anyhow, they said that 0W20 was necessary to properly actuate the type of variable valve timing introduced in the new design, anything thicker could be problematic. Sound familiar? Is it a coincidence that Ducati recently changed their oil viscosity statement from a mere recommendation for 15W50 to it needs to be 15W50 and don't use thinner viscosity such as 10W40 anymore? The Shell recommendation has been around a while with the sticker even being put on the clutch cover to use "Shell Advance Motorcycle Oil". Which cannot be bought practically at all in North America.First, my dealer is not a 'typical low-life'.. he's a friend.. so pls take your disparaging comments elsewhere.
Second, maybe what he said has some validity. The extract from the 2015 owners manual - if that's what you posted above - lists "Shell" oil for the engine. I know most manufacturers list 'their' brand of oil, but Ducati hasn't done that here.
Again.. I'd be curious to see what other Ducati dealers say.. rather than guys like me who merely have an opinion..
What I'm getting at in my typical long winded fashion is that any oil recommendation revolving around the new VVT technology most likely has to do with initial viscosity and sheer stability (see bobistheoilguy.com), i.e. nature of the VVT system probably has made viscosity more of a critical factor, and since shared sump motorcycle engines tend to sheer (thin out) the oil over time. And where viscosity becomes more critical so does sheer stability over the course of the oil change interval. Sheer stability is the holy grail for tribologists when formulating motorcycle specific oil.
Maybe Shell is claiming new and improved sheer stability on their Advance line of motorcycle oil and that is what this was all about. Viscosity is directly related to oil pressure and most VVT technology needs oil pressure to be within certain limits.