HPL does TGA. The data is not publically available as it is proprietary, for obvious reasons.
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Ultimately HPL is liable for the products they put out there. Therefore they run TGA on the lubricants they sell ensuring that they meet high standards and perform well. I have yet to see a blender who is as approachable as HPL in discussing the products they sell without stonewalling potential customers or having them deal with a rigid PR department.
I was seriously impressed with HPL's cleaning abilities after seeing
@OVERKILL's thread from last night:
https://bobistheoilguy.com/forums/threads/amsoil-eao11-2019-ram-1500-5-7l-11-144km.364312
This is the kind of stuff that you don't get to see in a cheap UOA or on a PDS.
See above: TGA. HPL tests their oils beyond what other blenders do. Their oils are also tested in racing applications, and consequently engine teardowns are performed.
I guess you will have to trust that you're buying a good product from a reputable company, or shop somewhere else. Or maybe ask the big guys why they're not providing NOACK? However, a low advertised NOACK value is not a guarantee for anything, unfortunately.