Catching this one a little late...
Not sure this qualifies as the total independent test some are looking for, but I've been running AMSOIL 0w30 in my 06 CTS-V for a few oil changes now and my wear results are well below the univeral averages for this motor family for the lab I use (Blackstone):
Cadillac CTS-V Used Oil Analysis – AMSOIL 0w30
As for the
AMSOIL Ea Oil Filter, I really do feel that it is better than other filters on the market because of its new nano-fiber technology that improves filtration without sacrificing flow. They did a better job of explaining this technology on the above link than I can.
