I talked to Cross ( Syngard parent company ) and they said they use Type III Bases Oil. I have never seen Viscosity Indexes this high on a line of oils. I am curious how they do it? I bought some but I haven't used it yet, their prices are good.
www.crossoil.com/lib/docs/pds/PDSFullSyntheticPCMOSNSynGard.pdf
www.crossoil.com/lib/docs/pds/PDSFullSyntheticPCMOSNSynGard.pdf