It's all relative, I've always used middle shelf oil under stupid conditions...my engines have always lasted beyond what you'd expect for them. 350,000Kms on a 4AGE living on the redline most of it's life, 160,000kms on an RB25DE+t when that was stolen it wasn't blowing smoke or showing any signs of oil related problems....it must have seemed OK, the dodgy dealer down NSW seemed to think it deserved a rewind back to 35,000kms
I doubt there would be any bennefit over most average to premium oils out there, especially the amount of K's most people here drive....just a brand price premium people pay.