Since I got dragged into this, I get the opportunity to defend my position ...
UOAs are fantastic tools, but nearly everyone here on BITOG does not use them correctly.
In macro-data analysis, UOAs can give us a great understanding of how our data compares/contrasts to others, when considering ALL reall world inputs (drivers, distances, environments, brands/grades, etc ...). You can see what is "normal" for a broad range of applications. But the macro-data can't tell you how any one specific input manipulates the groupings because it's muddled in with all the rest. It's incredibly easy to get enough data for these type studies; tens of thousands of them exist.
In micro-data analysis, you get to choose the exact inputs to include and manipulate. And you must be diligent about holding all others as constants, as best possible. The minimum data needed for credible analysis is a very, very large burden that most people here don't have the time/money to collect. Whereas a single or few samples are easy to get, collecting enough data (30 samples for any selected variable, and then 30 more for it's competitor) takes WAY longer.
Blackstone's UOAs can be used for providing data for either type of analysis, just as any other UOA service that includes spectral analysis for metals, etc. But do not lean on any of those UOA companies for actual "analysis" of the data; they only analyze the oil. It's true that Blackstone has made some generalized statements, and when considering macro-data, their position is reasonably defendable. But IN NO WAY does that apply to micro-analysis.
Good question... Blackstone's 35 years worth of racing and street motorcycle oil analysis shows no significant differences in WEAR between the grades or brands... in other words either a 30 grade a 50 grade oil will meet and exceed your mileage expectations... but only the 30 will let you enjoy more horse power and lower engine temps...
I think you're taking a LOT of liberty with their generalized statements. Here's the only thing I'm aware of them stating on their FAQ page ... I have NEVER seens them make statements about "mileage expectations" or wear data in micro-analysis
What’s the best oil to use?
All your gas and diesel engine oil sampling questions answered, in one handy section!
Ah, the million dollar question. We are an independent lab, so we don’t make recommendations. It has been our experience that oil is oil, and either petroleum or synthetic-based oil will work well for just about any engine.
Come on, you’re holding out on me. I should use synthetic, right?
Buddy, you should use whatever you want. Synthetic oil won’t guarantee a longer engine life any more than my eating organic food will guarantee I’ll live until I’m 90. We here at Blackstone generally use regular petroleum-based oil because honestly, it works just as well for us.
Singular UOAs are good tools for confirming that nothing is wrong (no abnormally high wear rates, no significant contaminant intrusion, etc). Small groups of UOAs can show a trend, if present. But having only a few UOAs can not, in any way, provide a meaningful, credible view of individual choices or options.
I would willingly offer my analytical skills if someone actually needs it in micro-analysis. But I'm very strict in the development of DOEs (design of experiment) and the payoff will be WAY down the road, because it'll take a LONG time and a LOT of money to get the true answer(s).