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GOOG it...there are literally pages of thread links on that product.
I was curious so I just spent ~15 mins perusing a few, which included oil 'experts', SAE Engineers, et al.
Mixed reviews, and the summations are mixed after pages of boiler plate and testing...
In some cases/some oils the product helped, in other oils it was slight detrimental, mostly having to due with the zinc additive.
Imo, not a miracle drug, and none of us are running these X5 engines to the hilt very often, if ever. A good oil/filter change does wonders...
GL, mD
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