Is Mobil 1 synthetic motor oil true fully 100% synthetic?

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is this true?

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Mobil 1, a couple of years ago, USED to be FULLY (100%)synthetic. Mobil sued Castrol, I believe, based on Castrol's advertising a new FULLY synthetic blend that was in fact NOT fully synthetic. At that point in time, Mobil had the ONLY fully Synthetic Blend available on commercial auto parts shelves with the exception of RoyalP, Amsoil, and Redline which were far smaller companies and not exactly targeting the same market. When you cut away the fat, the reason for the suit was profit margins, since Castrol could make their semi-synthetic and was labeling it FULL synthetic far cheaper than Mobil could create the FULL synthetic.

Castrol won the suit and was allowed to advertise their product as FULL SYNTHETIC for whatever reasons. Mobil then changed their blend from a true FULL synthetic to an organic based blend, kept the same prices, and now has a higher Profit Margin. Mobil is still good stuff but is is NOT FULLY synthetic anymore.
 
As far as my understanding goes... To meet the "Fully" standard it only has to be over 50% synthetic. So as far as I know, the only oils which are 100% synthetic are the ones that actually say 100%.
 
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