Ingredients, rocks are all natural; and organic. Some more: [ http://www.eatthis.com/8-confusing-food-labels-what-they-actually-mean/ ] So full synthetic and 100% meet the confusing standard because full should use highly refined mineral base stock (GroupIII) and 100% synthetic should use chemically made base stock mostly PAO (Group IV). But these days do you really know what's in the bottle?
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