Best oil for My Slant 6

Rug_Trucker said
He likes to add drama. Direct injected engines, you know the ones getting a shot from the cylinder wall is what he's talking about. At low speeds putting around town they need a special oil that has additives that resists oil dilution. I did my research on that stuff when I was buying oil from my ex-GF's 2.0 DI turbo Camaro.

We are talking about a carb'd slant 6 here.

chryslercruiser said
I respect and appreciate the knowledge all of you who have probably forgotten more about engines, and more specifically Mopars than I will ever know!!

BUT I direct your attention to the fact that:

Rotella T6 is listed as a "SN" rated oil.. on the back of the bottle
Here is the Rotella advertisement cut and pasted for easy reference:

EDIT: T4 may not be to the same standard, with I have not looked into!

Shell Rotella® T6 Multi-Vehicle Full Synthetic engine oil performs extremely well in diesel and gasoline engines, meeting both API CK-4 and API-SN standards and allowing mixed fleets to consolidate lubricants.

Go look up the SN specs and see how that works for the engines we are dealing with.

Those are fuel economy oils. For engines that have so little spring pressure they wouldn’t even be a stock 318 spring and cam lobes as gentle as the rolling hills.

Thin rings, small bores…I could go on.

This information is all over the web. Or better yet, call some high end oil manufacturers and talk to them.