Originally Posted By: sHERM
What current synthetic oils are PAO group IV based ?
The same ones that were in last week's identical thread, and the same ones from the week before that. Other than certain boutiques, certain HDEOs, and some European type oils, we don't know. Even then, it's dicey. A safe bet is that an oil that only meets SN/GF-5 is probably not going to be primarily PAO based.