Amsoil dealer or not, you guys are buying ester oil for the wrong reason. Nissan made everybody think you need ester oil, when in fact you are really after the nanoparticles formulated in their own brand. Obviously, replacing Nissan's fill with another ester based oil because Nissan recommends it, is wrong simply because you are missing those nanoparticles. People running non-ester basestock oils, including myself, have no issues with increased valvetrain noise, etc.
Please don't think I'm here telling you what to buy, but I have kept my mouth shut on this misconception for too long.
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