Still no easy way to know what has changed with SOPUS and Mobil oil compositions / add packs with the new SF/GF-5 rated oils . The only exception is Pennzoil conventional SN/GF-5 rated where I believe a Blackstone report indicated a stout add pack was in play . * Anybody finding anything definitive to share on any of the other SOPUS and Mobil conventional as well as synthetic SN/GF-5 oils with respect to changes in their composition , add packs , etc. versus the prior SM/GF-4 rated oils ?