Gentlemen: What motor oil do you use?

SSDAN that is damn deep article. I drowned a few pages in.

I know this.
I thought Amsoil and its extended drain oils were snake oil.
But I took chance and still didn't trust them. After filling my crankcase with their oil and one of their filters which is made by Wix to their specifications by the way, I had it tested by an independent oil lab, repeatedly. It went 18,000 miles before the lab recommended changing it. This was in a 2 litre 4 cylinder puddle jumper driven in Wisconsin weather and heat cycling is murder on oil. If I hadn't hit a deer and totaled the car with 225,000 mi on it in 2018, I would still be driving it today. Absolutely no oil related issues at all, car only required scheduled maintenance.