What sorts of performance improvements? Genuinely curious.No, they were formulated specifically to be VII free, that doesn't mean they are the best performing product line. Their higher tier VII-containing oils (star VII) are basically shear-free as well, but may perform better. As @High Performance Lubricants as noted on here in the past, incorporating VII's can offer performance improvements.
Take for example the following oils:
* 5W-30 P-PCMO. HTHS: 3.216 (star VII)
* 5W-30 PP-PCMO. HTHS: 3.161 (star VII + PAO)
* 5W-30 No-VII PCMO. HTHS: 3.399 (PAO)
The No-VII also seems to have the lowest MRV values, followed by PP PCMO, then P PCMO.
If I'm looking for the best protection (in this grade), why shouldn't I use No-VII given it has the highest HTHS?