Apparently Mobil 1 EP [Extended Performace] and maybe other lines has too gone to a Group III oil but without telling the public?

Quote Originally Posted by Tom, who is an oil "analyst" for Mobil1"
Okay boys and girls, take a seat cause you aren't going to like this.

The new M1 EP 5W-30 SM dated Oct 2006 just came out of the G.C. and it is MOSTLY mineral oil, presumably Group III. It also contains a good slug of AN and some PAO, but little or no ester. Will have more data tomorrow.

Just for the record, I intend to still use M1 EP, in spite of their slide down the slippery slope.

Tom
My understanding is Mobil1 users are paying Group IV prices for Group III oil. Mobil1's only public comments are is it's "fully synthetic". Amsoil made the switch to Group III with their XL line and told the public, yet they still call it "fully synthetic".

Can anyone add anything or correct me?

Reference:
http://theoildrop.server101.com/foru...rt=1&vc=1&nt=9