Fully Synthetic is full synthetic. There is no minimal synthetic. The bare min contents for a synthetic oil is 100% synthetic oilWhile I do not expect anyone to know exactly and though it is marketed as a "full synthetic", after 6 runs of it in my Rubicon (30K miles), I am leaning towards it being a "minimal" synthetic. No, I do not have any scientific data past my UOAs, but it has the same physical observed characteristics after a 5K run as the Mobil Super 5000 that I used in my 2010 FX4 for a number of runs. It is much darker than any of the other synthetics I have used (Castrol, Pennzoil, and Kendall), it produces some carbon flakes in the filter (just like MS5K did) and has somewhat of a burned smell to it.
Yes, naysayers, I know, far from scientific or convincing, but something tells me it has the bare minimum contents to be labeled a synthetic. Has anyone had a similar experience when comparing it to other oils or does anyone know what its composition is?
Semi synthetic is a mixture of conventional and synthetic.