Anyone use royal purple oil?

I mean I use it and I have no complaints. I just care more about preserving the life of my engine. Thought RP was top of the line stuff
 
I use it in all my Ford plumbing vans, some have over 250k miles with 0 issues. The problem with Ford vans is the ticky tack things that go out!! Is it worth it, yes i have 0 complaints.
 
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