I found this useful information in the book entitled "High-Performance Jeep Cherokee XJ Builder's Guide" by Eric Zappe. All credit goes to him for compiling this information and putting out a great book. I recommend anyone pick it up even if you don't own an XJ. I took his segment about the over-sized filters and paraphrased it, put it in my own words with my own experiences below.:
This will fit 1993 and newer 4.0's with the horizontal oil filter adapter. If you have a vertical adapter you will need to convert to the horizontal type. The larger filter is about a 1/3 larger than stock and you will need to add about 1/4 quart more oil with your change. With the larger filter you get more filter media and cleaner oil for longer. I still change my oil every 4k-5k miles and have noticed a difference in the cleanliness since the switch. There is no drop in oil PSI and no price difference from the stock size filters. There are no con's in using a large filter, only pro's.
Brand - Part #
AC Delco - PF2
Fram - PH8A
K&N Gold - HP-3001
Mobil 1 - M1-301
Motorcraft - FL1H
Napa Gold - 1515
Purolator - 230001
WIX - 51515
Thanks again goto Mr. Eric Zappe.
This will fit 1993 and newer 4.0's with the horizontal oil filter adapter. If you have a vertical adapter you will need to convert to the horizontal type. The larger filter is about a 1/3 larger than stock and you will need to add about 1/4 quart more oil with your change. With the larger filter you get more filter media and cleaner oil for longer. I still change my oil every 4k-5k miles and have noticed a difference in the cleanliness since the switch. There is no drop in oil PSI and no price difference from the stock size filters. There are no con's in using a large filter, only pro's.
Brand - Part #
AC Delco - PF2
Fram - PH8A
K&N Gold - HP-3001
Mobil 1 - M1-301
Motorcraft - FL1H
Napa Gold - 1515
Purolator - 230001
WIX - 51515
Thanks again goto Mr. Eric Zappe.