| Like wot Fordie says, there's been a big bag full of 620/583 bikes ragged s***less for 2 years on Shell Advance and I can't recall any oil related problems... except it don't work too well on Griff's back tyre.
Maybe there's better oils? I don't know, but until you find one then you can't lose with the Shell stuff.
Sure there's a commercial partenership between Shell and Ducati to endorse each others producs, but would Ducati suggest using it if it was going to damage their engines? | 
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