I've used Amsoil in almost every vehicle I've owned/own, zero oil related failures, much the same as with any other oil I reckon.
But a year or two back, I had a specific oil related question, reached out by PM to a couple folks here that are neutral & technical.
Basically, what I was told, was "use any Amsoil product with confidence" & "there is no reason to disbelieve their claims" & "they use the latest and most stable chemistries out there".
The above coming from folks who neither endorse nor sell Amsoil, and at no point in time did they trash any other oil brand.
So my point being - we all buy different brand of vehicles at different price points, but why stoop to slagging the choices people make in buying oil?
There's very few folks on this board anymore that suggest an oil based on it being the most useful in a particular application, these are the folks I pay heed to.
The people I take rather seriously are in no particular order - Molakule, OVERKILL, kschachn, edyvw, ARCOGraphite, ZeeOhSix, Kuato and a couple others that I apologize for omitting.