Originally Posted By: FutureDoc
Originally Posted By: goodtimes
Fram brand stock filters are all high efficiency. There are rumors otherwise on OE clones. Rumor has it many OE filters are not efficient. I don't believe rumors so easily. I don't believe without better and more current data. I personally wouldn't use the Wix on a new car unless Subaru says it is compatible. They went to Fram for their filters, which says something. If they authorize, then the dealer cannot complain. The first thing they would do is point to that Wix filter and say that's the problem.
Oh for the love that is a flat-four/six...
They can't require an owner to use "Fram" or the Subie filter to keep my warranty. That is just bonkers. The WIX meets the spec for the vehicle, simple as that. On top, it is a lot better built than the blue filter (black filter is strong). Between Wix and the Black filter (even that had bypass quirks) those are the preferred filter for a lot of Subaru owners. I am guessing you take new cars to the dealer for oil changes for the "warranty" too. Uggg
Here is the Orange Can. The fram-branded "Subaru" filter. It has some weird 96.2% efficiency rating listed other places with 95% but referring to different filters. The general agreement is that the 96.2% rating is likely at >40 microns. This is not uncommon with filters that are less restrictive (which subaru tends to opt towards since it is easier with the higher bypass). Heck, we know there are Purolators with poor efficiency in the same grouping. Still, if you enter your Subaru into the fram part finder, it will come back with the cross-fitting Acura, Gm, Honda, Mitzu, etc filter. Why would subaru opt for the Fram? My guess is that it meets the minimum and offers dealers to walk away with an extra $5 in profit.
http://www.fram.com/Search-Parts/Part-Detail?PN=PH9715
"General agreement" means it's a rumor. All stock Frams are synthetic blends and high efficiency filters, except the Ultra, even the EG. What I said is right. That's OK have on with your brand loyalty because you bought it. With a special requirement, you have to use factory authorized parts meeting the requirement to avoid warranty hassles, not aftermarket parts you personally think must meet it. Subaru went to Fram for their filters, not that it matters who they went to, but that is fact. I see no data the black filter is more robust, or any efficiency numbers, or anything making it better by looking at it from the outside, just it's made in Japan.