Amsoil OE Synthetic

BenK wrote:
For most folks...regular, approved/certified/etc engine oil is just fine

But for those who driver HARD, the higher spec of synthetic is worth it...or
for those who are willing to pay and know the difference...it is in both the
base stock spec and the additive package spec. Key or one of the biggies is
the viscosity modifier spec

More pleats is out of context without the depth of those pleats...given the
material is the same.

Pleats are a way to increase the surface area, but a pleat vs another pleat
is incomplete without the depth & material spec (porosity...filter max size
particulate, GPH, etc)

I personally do not like the lower viscosity...especially the first numnber's
viscosity value...but...I live in a warm climate area...even when I skied
a lot, didn't want the lower viscosity oils

Quietness or noise will show up later..when the miles do their thing on
wear of the valve train parts...or...not...

Ben, I'm generally in agreement with most of what you post here, however, regarding "thin" viscosity oil, I'm going to respectfully disagree. As a disclaimer, I will admit that over the years ( many years ago ) I have used a lot of Castrol GTX 20W-50 in various water cooled and air cooled motorcycle engines, and a few cars/trucks. I'm also old enough, and was lucky enough to have spent time on a crew working on "super modifieds" ( the precursor to Sprint cars ) and I've poured a lot of good old Kendall GT1 straight 50 back in the late 1960's. Point is, I too am one who has used a lot "heavier" oils.

However, in today's world, light vis oils rule. As an example, in my Nissan VQ series engine, there are some "very tiny" oil galleys, and if a person runs a heavier oil, you are almost assured of starving some parts of oil until the oil is fully warmed up. Nissan is adamant about 5W-30 in this series engine. Not necessarily synthetic, but for sure on the weight. So my "compromise", since I am essentially forced to use light vis oil, is to not only do that, but I up the game to synthetic.
Working so far.

EDIT. PS....before anyone goes and starts making quotes about how certain "racing teams" use a certain oil....yada, yada.....my comment is, don't even go there. That's a different world, those engines are built for different purposes, and assembled to different tolerances, and besides the oil gets "changed" very, very often. It really just does not compare well to street use, even towing use.