You cannot base the composition of oil only on MSDS. This was addressed since this forum exits and after that numerous times. MSDS only indicates harmful components that emergency personnel needs to know about. Mannol MSDS does not say anything useful. If they posted performance numbers we could find more, but they don't even do that, which is telling.Hmm, that MSDS is alarming but could possibly be for an older formulation? There's 10% ester but I can't see pao/polydecene anywhere. There are false advertising laws, why would they bother taking the risk?