From the MiniMopar filter study...
http://www.minimopar.net/oilfilterstudy.html#mobil1
"It uses a synthetic fiber element that can filter out very small particles and is very strong. It is rated just under the Purolator Pure One as far as filtering capability, but is still very much above conventional paper filters. It also has a very strong construction to withstand high pressure spikes during start-up. However, as with all Mobil 1 products, expect to pay 2 - 3 times as much for this filter.
I have received many reports of these filters failing at high pressures. It seems that the seam where the backplate crimps to the case can split."
OK, so Champion Labs makes these things like the proverbial brick crapper and they split wide open.
Assuming that these reports have some validity, anyone like to tell me what might be going on?