In looking at a couple of posts, it seems to this old cowboy that GC 0w-30 (04) appears to be the same thing as Syntec 0w-30. I go the info from the VOA library for Syntec and the VOA comparing 04 and 05 GC. I realize that the common wisdom says Syntec is group III and GC is PAO, but the add packs seem to be the same. Did I misread it? Thanx Bob W.