Towel Rail Posted November 6, 2007 Share Posted November 6, 2007 I just found out that both filters share the same thread and O-ring size. Seems like running the larger size could allow more flow, and spend less time in bypass mode, all else being equal. I was surprised at first by how dinky the specified filter is compared the ones I've run on other cars. Thoughts? - Scott Quote Link to comment Share on other sites More sharing options...
GeneralDisorder Posted November 6, 2007 Share Posted November 6, 2007 I generally run the WIX (Napa is the same) filters. They are larger than OEM and very high quality so...... GD Quote Link to comment Share on other sites More sharing options...
2.5GL Posted November 6, 2007 Share Posted November 6, 2007 Car Quest premium = WIX and I use it on my car since SUBARU quit using the 15208AA060 (large) filter and went to the 15208AA100 (small) filter. Just don't use a FRAM, Multiple personal experiences (mine and others near and dear to me) and otherwise a personal and professional opinion. Look here for your filtering needs: http://minimopar.knizefamily.net/oilfilterstudy.html Lewis Quote Link to comment Share on other sites More sharing options...
nickb21 Posted November 6, 2007 Share Posted November 6, 2007 Couple threads here. http://www.ultimatesubaru.org/forum/showthread.php?t=51957 Summary: The AA100 is smaller but has the same, if not more filter area. Is either better than the other? Beats me. If I recall correctly the H6 filters are more expensive. Quote Link to comment Share on other sites More sharing options...
porcupine73 Posted November 7, 2007 Share Posted November 7, 2007 There is an article on http://www.endwrench.com about this. Can find it if desired. Quote Link to comment Share on other sites More sharing options...
Towel Rail Posted November 7, 2007 Author Share Posted November 7, 2007 There is an article on http://www.endwrench.com about this. Can find it if desired. This is the article that gave me the idea. Quote Link to comment Share on other sites More sharing options...
DerFahrer Posted November 7, 2007 Share Posted November 7, 2007 The reason for the small filter on the 4cyls is so it will clear the exhaust on the turbo cars. Originally Subaru sold the small filter exclusively for the turbo models, but in the interest of simplicity, they decided to just use the small filter for all 4cyls. Quote Link to comment Share on other sites More sharing options...
Towel Rail Posted November 7, 2007 Author Share Posted November 7, 2007 Makes sense. I had just changed my oil before starting this thread, but I think I'll use the big filters in the future. :cool: Quote Link to comment Share on other sites More sharing options...
jib Posted November 7, 2007 Share Posted November 7, 2007 This is the article that gave me the idea. Nice! While a smaller filter should be fine, larger is better in my book. If your engine is clogging up, even the smaller filter, and causing oil to bypass the filter, you have some serious issues. Jack Quote Link to comment Share on other sites More sharing options...
eryque Posted November 9, 2007 Share Posted November 9, 2007 It just happens that I'm about to change my oil, so I figured that I'd check out the filter for the H6. I didn't check all the brands, but the PureOne filters look identical. Same size, same diameter, and it looked like the same threads. Since it didn't appear that there would be any advantage I went for the right part number for my engine, but was kind of surprised that the H6 filter was the same size. Quote Link to comment Share on other sites More sharing options...
Petersubaru Posted November 9, 2007 Share Posted November 9, 2007 Genuine Nippon from rockauto.com $2.45ea..outside looks identical to the mobile 1, including the metal stop ring for proper tightening(for those that need that) Quote Link to comment Share on other sites More sharing options...
fnlyfnd Posted November 10, 2007 Share Posted November 10, 2007 I know some pontiac GTP'ers use blazer filters because they are bigger. Their reasoning...cooler oil since it gets exposed to more air flow Quote Link to comment Share on other sites More sharing options...
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