I rather think that the amount of times you saw vehicles come in with damaged engines running royal purple had a lot more to do with the fact that people who beat the crap out of their motors daily, especially those in the race community, use royal purple oil a LOT more regularly than your average consumer. It has been tested and found to be better than your standard engine in those applicable situations wherein a person is running really high RPMs pretty consistently, but that doesn't change the fact that these engines are, in fact, getting the ever living stuffing beat out of them by the people driving them. Not to mention, a lot of people cause their own engine damage by running outside of the engines parameters, such as revving beyond the limits of the parts within the engine, pushing too much boost or nitrous, or the infamous money-shift taking out the old powerhouse. There is a lot more to consider when talking about people who beat the brakes off their cars. But I, personally of course, don't think running royal purple is necessary when talking about normal people and their daily drivers, as it probably doesn't benefit them in any way under those light conditions.