Interesting...I just did a quick search and found that it does have superior cleaning advantages. My Genesis is GDI, so it gets carbon buildup on the intake valves...definitely no bueno. Although I have catch-cans, it still happens (just not as fast)...I wonder if the Pennzoil Ultra would help that.
For my Spyder, I've never looked inside the engine beyond the top of the pistons, and they look surprisingly clean...and it doesn't seem to burn much oil at all. It doesn't like to be "full", and always settles to the mid level on the dipstick, where it stays pretty much until the oil change.
Either way, this is great information...I used to avoid Pennzoil back in the early 90's on a 1968 Mustang I rebuilt. It would sludge up pretty bad back then, but clearly old habits die hard with me! Time to see things have changed.