I'm diggin' all the techno-geekspeek in this forum. But why don't we all try takin' a slightly different tack? What I would like to see is actual, real-world, real-time results of engine wear, longevity, fuel mileage &c. using the different oils discussed here. I'm a driveway mechanic, as well as hopelessly OCD- the very idea of letting someone else change my oil breaks me out! LOL I live in Raleigh NC, which is mildly temperate and just north of subtropical. Temps don't get too much below freezing, nor much over mid-90s in summer. I've been using Rotella 'cause it's available, proven, and I can tell the car likes it. No soot problems, no sign of engine wear, and I can push the drain interval a little if I have to without worry. I take it out anywheres from 5 to 7k miles, no prob. Aside from being jet-black, the oil shows no sign of being hurt.
I look forward to any good techy feedback, especially from guys who actually have had a motor or two apart to really see what's happening inside. Thanks y'all! Keep on clatterin'!