I disagree that Rotella was not to blame. Rotella doesn't have enough ZDDP, not enough by half, and it's not the right type of ZDDP. The high amount of detergents isn't favorable for ZDDP reactivity. Cheaper material is certainly a factor, but I'm seeing many more failures with Rotella and other shelf oils than with a dedicated break-in oil.
Driven BR40 vs Rotella T4
Elements............BR40.....T4
Boron..................0............198
Calcium..............450........2327
Magnesium........0.............14
Phosphorus.......2550.......1034
Zinc....................2800.......1130
TBN....................2.2...........9.32
The type of ZDDP in BR40 is branched chained secondary alkyl. It's highly reactive and sacrificial. There's only enough detergent to get through the break-in. That oil makes ZDDP the star of the show and gets everything else out of its way.
You can add a supplement to Rotella, but it won't take the unwanted additives out. If you have to add a supplement, you're using the wrong oil.
Driven BR40 vs Rotella T4
Elements............BR40.....T4
Boron..................0............198
Calcium..............450........2327
Magnesium........0.............14
Phosphorus.......2550.......1034
Zinc....................2800.......1130
TBN....................2.2...........9.32
The type of ZDDP in BR40 is branched chained secondary alkyl. It's highly reactive and sacrificial. There's only enough detergent to get through the break-in. That oil makes ZDDP the star of the show and gets everything else out of its way.
You can add a supplement to Rotella, but it won't take the unwanted additives out. If you have to add a supplement, you're using the wrong oil.