Well done guys...thoroughly interesting for me, although I think we were losing "Mrs. ALCO".
One lingering question from Gaston's reference to the Castrol vs. Mobil synthetic oil fight. Where do the polyalphaolefin (PAO), synthetic esters, and alkylated aromatics that make up a Goup 4 synthetic come from? I know that Group 4 molecules are made up in the lab, unlike Group 3's which are "hydroisomerized petroleum base stocks" but made up from what?