You can never go wrong with the Mazda OEM oil filter.  There are some apprehensions about these Mazda oil filters, as the the newest batch of oil filters "looked" inferior to the older batches - the lettering on the metal case is not as sharp (i.e. smeared) versus the older units; the internals look "cheaper" when peering into the center hold of the filter base.  Whatever the case, if you do run into oil filtration problems, you can blame Mazda!

If we're talking about aftermarket oil filters here, then you gotta check out the Oil Filter Study that's well-known in the automotive circles on the Inet.  I really can't summerize the entire contents of the infamous Oil Filter Study, so here's a link...

Click here for the MiniMopar Oil Filter Study!

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