But in all seriousness speedtc, questions like that just strike me as posting in an attempt to stir things up. Surely you can't be serious with that question?!?!
Maybe I'm mistaken, but I don't think ANY oil sold today (barring some extremely low-grade oil sold at a convenience store) causes sludging. Most (all?) sludging issues are due to other factors, usually something with the engine design, or manufacturers spec'ing too long of an OCI for a vehicle. I think the days of motor oil causing sludging are long gone.