Adreed24,
Blue99 summed it up very well... just an amplification to explain...symantic's get in the way sometimes of all this, you know "Dino's" for Dinosaur...
Everything you see and touch on earth is either grown or mined "first" and then either used in it's natural state or converted through mixing, blending or manufacturing processes.
All of the lubricants discussed on this forum, Group I-V are originally fossil fuel based "Dino" if you will, (oil, gas and coal), they all come from the conversion of plant, animal and microrganism's created under heat and pressure in the ground...we just see them differently, liquid, gas or solid...
Groups I-III are from crude oil (liquid state), as Blue99 stated, group III is taken another step and further refined by Hydro-cracking rather than just the normal manufacuring process of distillation by heat and pressure (Groups I-II) to actually change the hydrocarbon molecule structure, thus the "synthetic" designation. I guess you could say, "Man changed it" - but did not "make it".
Groups IV-V, as stated are PAO or Ester based, which are hydrocarbon liquids, derived originally from Natural Gas (ah, a fossil fuel or "dino based" , which is converted into a liquid state through processing, first created from making Methonal. So the confusion you may be having is where people use the word "dino" to signify that it comes from crude oil vs. "synthetic" that comes from natural gas which is just processed differently... It all originally comes from fossil fuels, extracted in different physical states, processed (some more than others) and is orginally mined.... all I guess from "Dino's".... Clear?
