Just for the record, Mobil 1 is not and probably never will be e-core. Champion makes their filters off of specs provided to them by companies. Mobil 1 doesnt want ecores, they already have their filter the way they want it, but thats not saying ecores are junk. The ecore style allows for separation of every internal piece of the filter, so different parts can be recycled, discarded, etc. The dual adbv/relief valve, is as good as coventional non-ecore, the filter endcaps are thermally "welded" to the media(beat that Fram!), and the nylon core has a higher collapse strength than conventional metal tube centers. The medias in the filters were not messed with. The filters happen to be shorter now, but that is just because Champion can fit all the same components of a normal filter in a smaller canister.
