Since new I’ve been using Rotella GasTruck or Amsoil 0W20 in my wife’s Ascent with either a Purolator Boss or Amsoil filter With great results so far. My neighbor works for the distributor of RP and can get me RP for %70 off and filters at cost, that makes it cheaper than Walmart Supertech. Theres videos of Amsoil vs RP filters while cut open they’re the exact same filter made by the same company. I’ve never tried Royal Purple in my life, I can’t take my neighbors word for it, he’s a rep for the company. Has anyone ran it in their Ascent? Please, spare me the opinion on using a Subaru filter.