Originally Posted by SouthArk370Z

I never use any oil additives - I just change the oil when it needs it. IMNSHO, if you need additives, what you actually need is a different oil. YMMV

But, hey, if it provides you some benefit, then I'm all for it.

I might use something like the cleaner on an older car that I may have just bought and the PO didn't take care of the engine.