How can it be that some additive manufacturer can have a miracle, cure-all additive without knowing the chemistry of the oil it will be used in? The answer is, they don't. They are masters at marketing, not science chemistry and engineering.
Anecdotal evidence based solely on the experiences of individual consumers and testimonials reporting specific performance attributes in the absence of reliable independent evidence showing performance capability is insufficient to support product claims.
All of these products are just psychological placebos. Simply use a good quality oil, it will have all the additives your engine needs, mixed right in. Oil additives only serve to lessen the effectiveness of your oil's additives and lubrication properties.
The Bottom Line Don't use any oil additives whatsoever, NONE of them are effective and many are damaging. Simply use a good quality oil, its got all the additives you need