Hello,
I am using 15w50 silkolene oil, so far no problems although my local Ducati dealer only seem to stock 10w40 and could not understand why I would need to put any thing other in.
I have had one engine go bang am am sick of paying for rockers, that Ducati deny are a problem.
I will change my oil every 2 to 3000 miles and see how I get on.
Like I say so far no problems, bike seems to run well after a good run.
Hope this helps some. . .
regards
TopiToo