Using these two SOPUS 5W30 synthetic oils as a comparison - dare I say the add pack in the QSUD 5W30 is not only different but perhaps slightly better (i.e. moly content ?) Not sure what games can be played with the natural gas conversion process in PPP but the QSUD 5W30 add pack appears to be quite good (considering it's the little sister of the higher end PPP) ... Your thoughts ?