I haven't seen the SM rated GF-4 at the stores yet. Recently I bought a case of the SL-rated GF-4 Chevron Supreme 5W30. Iso-Syn is still very prominently on the front of the bottle. Some of the lettering is now in a nice gold tone. On the back it says it meets the requirements of GM-6094M, Ford WSS-M2C-929-A, and DaimlerChrysler MS-6395L. I'm sure that someone else on BITOG can say more about what those specs are...