I've been running stock 7 micron Fleetguard FF since day one. No failures, no problems. Noting that Mopar is now offering a replacement filter kit to improve filtration to 2 micron so I am concerned that 7 micron is enough for CR engine. The attachment has to be taken with a huge grain of salt becasue it is a Fleetguard release. I am however concerned about aftermarket products. Note on web search that there is a posting about the Baldwin drop-in filter not snapping into the OEM cover. The OEM drop-in filter has a thin wafer end plate design and the aftermarket does not. The aftermarket looks beefier but is it actually better? One question I have always had with a 5 micron in original form, the size of the filter is the same so flow has to be restricted somewhat. Why hasn't Fleetguard gone to 5 micron on its original design? The finer mesh spin-on filters are much larger in size. Not pushing an opinion here, but I'll stick with OEM for now, and I'm considering the Mopar spin-on upgrade. Comments welcome.