Ahh yes the Mazda service dept, who were already going to use a Mazda filter anyway, have been told to use a different Mazda filter so that Mazda can make oodles more money. Got it.
Subaru Oil Filter ByPass Questions & Filter Comparison
- Thread starter Bellavita
- Start date
Ahh yes the Mazda service dept, who were already going to use a Mazda filter anyway, have been told to use a different Mazda filter so that Mazda can make oodles more money. Got it.
Wasn’t challenging you… challenging Mazda’s aluminum curtain concealing their info
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- Jul 11, 2014
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The reason for most of the 'filter fear' comes from the 'jobber' filters at quick lubes and indies, and 'knock offs' sold online. I'm afraid of them too. I don't buy filters from makebelieve internet stores, and my cars at not serviced at quicklubes or indie shops. I DIY and have all the faith in the world from the selective brands' midline and premium filters at autozone/pepboys/oreillyauto/advanceautocarquest/napa/....
I believe in choice. I don't use OE oil filters, OE oil/atf/psf/coolant, don't need OE engine or cabin air filters, wipers, tires, washer fluid, rotors/pads, FI cleaners... etc.
I don't worry about aftermarket filters. I wonder how many quicklubes and indies source OE oil filters for God only knows how many 10,000's of oil/filter changes on subarus/hyundais.... every year.
I believe in choice. I don't use OE oil filters, OE oil/atf/psf/coolant, don't need OE engine or cabin air filters, wipers, tires, washer fluid, rotors/pads, FI cleaners... etc.
I don't worry about aftermarket filters. I wonder how many quicklubes and indies source OE oil filters for God only knows how many 10,000's of oil/filter changes on subarus/hyundais.... every year.
The Mazda filter bulletin says the size and the threads are the same between the two. It probably is the bypass valve setting difference and/or a filter media flow performance difference. Are the turboed Subaru engines the ones with the super high volume oil pump?
Even the N/A EJs have the ~12.5gpm pump… Trav had said something about the turbos having a 1mm thicker rotor which would bump that even more!
The picture in post 32 says it requires a high flow filter.
Fram has their racing line which claims higher flow which isn't often discussed, but I imagine that would be a reasonable option.
They are 94% at 20micron. Which is pretty good.
www.fram.com
Fram has their racing line which claims higher flow which isn't often discussed, but I imagine that would be a reasonable option.
They are 94% at 20micron. Which is pretty good.
FRAM Racing® Oil Filter Spin-On
FRAM Racing® filters are designed with a heavy-gauge tapping plate and an extra-thick* steel can that is able to withstand the high pressure flexing caused by demanding driving conditions. A spiral-shaped center tube provides protection against collapse,
www.fram.com
IIRC it is AC/Delco who puts the bypass in the base. All others put it at the far end of the filter so bypass oil flows over the dirty side of the filter element before returning down the center of the can. If crud stays stuck in the element than all is fine but the harmful big crud is less likely to stick.
Also the far end of the filter is a dead zone, less flow, where sediment tends to settle until the bypass opens then flow starts.
On my Subaru, the base plate is in the down position, bypass valve up at the dome of the filter. So this means whatever crud would be at the base would not be entering through the by-pass valve when it opens. This is really good to know . . . thank you ZeeOSix!
