Never heard of Driven brand LS oil. Where do you purchase the Rotella T6?For LS engines or newer stuff which I do not like I would use Driven brand LS oil.
In fact that is what my friends and my cam grinder buddy use in their NOT stock ls engines.
500+ HP deals That do get beat on.
But if the Mobil is working for you and not ticking on start up or sitting there at idle ticking then I see no issue with the choice of oil.
I just can't run an oil that makes my engine noisy.
Before switching to Mobil-1 many years ago, I ran Havoline oil and had good luck. My auto mechanics teacher in high school swore by Havoline.
I think perhaps engine longevity is more dependent on routine oil changes and how vehicles are driven. I don't drive them hard like I did when a teenager. LOL
Swampratt, you and your buddies I think push them to the limit, like pulling under-rated/over-loaded trailers.