Hello everyone, I am new here, and I am trying to figure out what kind of oil I should be using in my 1996 Subaru Outback. It has a 2.5l DOHC motor with 143,000 miles. I just resealed the whole motor and reseated all of the valves. While I was in there I checked out the internals of the motor, and the cylinders look like new (The original machine marks from the factory are still easily visible inside the block). That said, the motor is basically in perfect running condition with no known problems over the rest of the vehicle. I am currently using Mobil 1 5w30 with a Napa platinum filter, but only because that seems to be the popular choice on subaruoutback.org. The manufacturer recommends 5w30 motor oil with an ILSAC certification. The recommended OCI is 3750k, but I have been changing it at 3000k based on my mechanics recommendation. I live in the Inland Pacific Northwest (Spokane, WA), so we get the full four seasons (low 100’s to upper 90’s in the summer and sub-0 at times in the winter). I would not classify myself as a slow or an aggressive driver. I am fairly moderate in my driving habits. My daily drive is 12 miles to and from work, half freeway, half stop and go so I want protection without sludge and carbon buildup. I have been happy with Mobil 1, but I want to know if there is something better at a similar or lower price. I try to stay away from Pennzoil and Quaker State, because I have seen what parafene buildup can do to a motor over time. Let me know what you think.