It exceeds the ratings in the manual, and Silkoline have been around for years.
Is this really an issue?
Genuine question, I’m not arguing
This topic has been going round in here and elsewhere for decades now.
The engine and gearbox is not the issue. I would happily run mine on any old oil, well, new oil.
But then we have that small matter of the clutch. And therein lies the problem just waiting to bite you on the bum.
I bought a lifetime's supply of the Advantec at about £11 a litre from the Chermans a couple of years ago. And haven't ridden as far as an oil change ever since