i have only used amsoil signature synthetic in all my cars since 2005.
i actually go a larger amount of track days than i think anyone i know on the same oil. i also get it analyzed at blackstone and it looks good. i had better pressure in track conditions than someone else i saw with data at lower temps and heavier oil even from redline.
it's not the cheapest but i am a big fan.
in a normal daily driver these days i'd probably just run the amazon stuff.