As part of my BYOF vs Dealership Oil question, I'm also wondering which is best: providing my own Wix filter for a 5-6K OCI or using a dealership OEM filter. In my case, it would be a Mopar for my Dodge, and a Motorcraft for my Ford truck. I think Purolator makes Mopar, and I'm not sure who currently makes Motorcraft. I know Purolator has had a lot of documented QC issues with torn filter media. Wix is top shelf for a normal OCI (to the best of my knowledge). So if a dealership allows BYOF, what's better: Wix or Mopar/Motorcraft OEM?