I have run both the Ultra and the EAO filters on my CTS-V and they both performed very well. No issues with either of them. I have both on the shelf, so it's like flipping a coin. The Amsoil filter is taller than the Fram Ultra equivalent that I have, but you can't go wrong with either of them. No matter what, the Amsoil EAO will cost you more than the Fram Ultra. I get Amsoil at dealer pricing and the Amsoil filters are more than double what I got the Ultras for online. I didn't get my Ultras from Walmart. I have always liked Amsoil products. Right now, I am running Mobil 1 with the Fram Ultra oil filter. I may go back to the taller EAO oil filter on my next OCI. I don't know if the smaller Ultra has more filtering media over the taller Amsoil EAO filter.