Originally posted by fastcougar:
Well, after some more research, it appears that I have found much conflicting information concerning Mobil1 and their user of Group III vs. Group IV base stock. All the "official" reading states that they do indeed use a Group IV ... foot in mouth



Mobil is a huge producer of Group III base stocks. What are they using it on? It looks like they are using it for Mobil 5000. It also looks like Mobil 7500 is a blend of Group III and about 15% to 20% Group IV, making 7500 a true "synthetic blend" instead of a "pretend" blend because it has some Goupr II+ or Group III in it.

But engine oil is not really the topic of this thread.

Jim Johnson 98 SVT 03 Escape Limited