Originally Posted By: cmlind
On all the old ones the metal cap on the thread end either separated when taken apart or was easily separated. I am not sure that is the end of the world as the spring held it together and it likely sealed ok, but not a good sign.
I have cut open numerous FL400s filters, and I also had one where one of the metal end-caps came off with a little pulling, but it didn't just fall off, and so I suspect the spring held it in place just fine. Interestingly enough, the glue underneath completely held its shape, so I think even if the endcap was capable of 'coming off' the glue would have continued to do its job.
Originally Posted By: cmlind
I go 5000 miles on these. I will be using Wix in the future. I can get a real Wix brand from a local parts store with my work discount for less than the Motorcraft at Walmart anyway.
For what it's worth, I've run 7,500 miles on every single one of the FL400s filters that I've run in my fusion, and I've yet to find one that didn't very clearly hold up under that FCI.