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Been keeping my eye on feedback for the Valvoline R&P also. Put it in my wifes ecoboost and my E46 with 259,000 miles last oil change. The E46 runs very well already but I may have noticed a slight improvement, could've been placebo though.
Not sure if it'll be worth using in my M340 since it's low mileage but I may still use it to ensure it stays clean.
Seems interesting from all the R&D they've detaild.
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