Your talking about Mobil'* dino oil called "Drive Clean". I would suggest you do a search on the "Drive Clean" before using it.
Mobil 1 is Mobil'* synthetic line, which is likely the only grp iv synthetic available otc.
Amsoil and Schaffer'* is also excellent oil.
Mobil 1 10w-30 will be going into my LSS after my current stock of waly synthetic 10w-30 is used up. I have one more change on it..then to Mobil.
Because of the amount of miles i drive, the oil is changed every 2-3 weeks which is 3000 miles. With M1, I'll strech it out to 4500.
1999 Buick Regal LS
ZZP 2.5" SS 304 DP, GTP Cat Back , GMPP Handling Kit, poly links and midpoints, HIR 9012/9011 with upgraded relay harness, 5000k HID fogs , 12" Impala/MC brake upgrade, Mag cat 94106, Ported and Polished LIM