About a month ago we traded the wife's 2011 Wrangler Unlimited Sport in and got a 2013 Wrangler Unlimited Sahara, and I'm going to change the oil in it for the first time this weekend. The '11 had the 3.8, but the '13 has the 3.6 Pentastar, which uses a cartridge filter. I have zero experience with cartridge filters, so I figured I'd ask for some recommendations. For now, the oil will be the "old" PP 5W-20 since I have a 30+ quart stash of it, and I'll probably just do OCIs according to the OLM. I did some searching, and here's what the local auto parts stores have in stock locally: AAP: Purolator P1 - $13.49 NAPA: NAPA Gold - $5.85 O'Reillys: MicroGard - $5.99 Wix: $6.99 Fram Extra Guard $13.99 Bosch Premium - $10.99 Auto Zone: Bosch Premium - $10.99 STP - $11.99 Fram Extra Guard - $13.99 Any reason to not go with the NAPA Gold or Wix? Seems odd they are so much cheaper, along with the MicroGard. (Which I'm thinking may also be a Wix) Any recommendations that are not on the list? I also checked Rock Auto, they had pretty much the same options but would cost more after shipping.