Since my fiance's Cobalt is so easy to work on and analyze the filters post-use, I've been keeping track of how well the various brands I've used have held up. My winners are the ACDelco, Champ, and Napa Gold thus far. All of them held up well with regards to how the pleats looked after use. They did have some contorting, but it wasn't bad. The best-looking one was the Champ with regards to the condition of the pleats. There was almost no visible contortion. I've only had one UOA done on this, but the Napa Gold had incredibly low insoluables. I would say that is great filtration! I currently have a PureONE in now that I'm anxious to see once it's been used as well. The worst I've seen was a Fram. I pulled one of these out of my neighbor's Cobalt, and the media looked like it was starting to tear apart after 4,000 miles. Those are just my casual observations. They may or may not mean anything, but I thought you all would enjoy the read. Cheers!