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.
Then go buy a Wix. Or go to the dealer. Leave the cheap stuff (and Fram) on the shelf.
Engine is running smooth as butter and gets over 30 mpg on the freeway, so she seems to be fine with it
I use a Wix 57356XP filters and Mobil 1.
Wix or the Black Mazda filters.
I would highly recommend Rock auto, there website is simple old school but they are no bs auto parts store and will only show what does fit. They often show the real part your buying (say for tie rod), I've bought thousands of $ of brakes and suspension components over the last 20 yrs and always correct, they often sell OEM parts or the direct suppliers version of OEM which is unique. It will take some time for most of the aftermarket parts for the CX50 but at this point WIX or OEM Mazda are going to be your best bet for oil filters
If you're going to go aftermarket, the Wix/Napa Gold filter is also designed to meet Mazda's specs.
The car takes a different oil filter (wix 57170). The filter housing has a center structure coming out of it that slides in the bottom of the filter (to keep it in place?) and the new filter doesnt have that. I sat there with a dremel for 2 hours and made the new filter fit. Success, but its still leaking the same amount of oil.
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