I wouldnt think you wouldnt notice any issues using a spacific oil unless you could measure wear tolerances in your bearings. As the oil breaks down, it becomes less effective. But you wouldnt notice untill your motor blew or your turbo blows......

Ive read several post of people who have their oil tested and the brad penn seems to be known for breaking down faster then average oils. But it is a race oil and isnt really intended for daily use.

Not saying you cant daily it, just meant that Rotella is good for way more then 5k changes. Altho I change my oil way too much to worrie about life spans. Lol.

For the record.. I use what ever is on sale at walmart in the truck... Except for no name brands. and Sandras 1g gets on sale synthetic.

Wheres Jason Drew and his Vr1 valvoline????