Originally Posted by Dallas69
I have never seen or heard of any engine being damaged using any certified oil.
If you do basic maintenance and regular oci you will go 200,000 miles or more whether you use ST or Amsoil.
Way too much handwringing over something as simple as oil.
There have been cases where certified oils weren't enough, but higher performance ones seemed to help. I'm thinking the Honda VCM sludge problem. It was really a design defect. However, that didn't seem to be where there was much of a difference between using Pennzoil YB, Mobil Super, Valvoline WB, Castrol GTX, or any number of different generic house brands. The problem seemed to be avoided with early oil changes (before the OLM) or when something like Mobil 1 or Pennzoil Platinum was used.