I use OEM filters on both, but I’ll use Wix filters if I’m not around the dealer.
I bought a 10 Wix filters off of Rockauto. Part #: 51394. Each one was $4.80 and shipping was $10. Came out to be roughly the same price as buying OEM ones from a dealership off of eBay and I would rather use Wix ones.
Wix is considered to be good, and it’s not expensive and readily available (can walk into local O’Reilly and buy off the shelf). Subaru OEM works if you’re close to a dealership or think to order it; I never remember to order and my local dealer is terrible, so I avoid them.
I'm going to use [this kit](https://www.fcpeuro.com/products/mini-oil-change-kit-5w-40-liqui-moly-molygen-11427512446kt-lm) in our R52(base model) we just got. I use the same oil in our R57s, and the Purflux filter(OEM?). When you change your oil you send back the used oil, filter, gasket and drain plug/washer and get a full refund credit to purchase parts or your next oil change kit, after the first one. That kit uses a Mann filter. They are a good brand, used them for years in my VWs
Mann makes the best fitting one that I can tell. I ordered a Mahle filter once and the inner diameter seemed larger than it should be leading me to think it’ll let oil past without filtering. The Mann was nice and snug the way it should’ve been.
Stick with the wix, rebuilders of rotory engine's suggest that brand alone. Given the necessity of the filtration needed for those engines, that's all I use for k20, 404xxxkm and running strong!
The WIX oil filer still included all the gaskets and a copper crush washer.
Pennzoil and a wix filter, 30 bucks total and 10 minutes of my time.
You want to stick to a reasonable quality of part. OE spec would be ideal. I won't use Crossland, Mann is the lowest I'll go.
I bought a Mann brand filter for less than 3 bucks on sale! In my case though the filter didn't help even though the old one was way dirty.
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