Does anyone know if Syntec is a mix of Grp 3, 4, and 5? Did Mobil sue b/c they say synthetic must be no Grp 3? As far as I know Syntec could be 50% grp 3, 40% grp 4, and the rest grp 5 and additives. Do we have evidence that there is no grp 4?
PS: I say this as a Mobil 1 user.