Originally Posted By: badtlc
The bypass rating is irrelevant since the media has to be considered, too. Again, Wix had to spend the money to develop a special filter for the skyactiv filters. That is a huge expense. I would NOT use filters listing applications other than the skyactiv motors.
That is certainly a valid argument.
Here is what I find interesting; the Wix 51365 is similar in size to the 57002, but has an 8-11 psi bypass setting. Now, instead of just taking the 51365 and inserting a slightly stronger spring in the bypass valve, Wix seems to have re-designed the whole filter, including the use of a different baseplate. Is the media inside different? No way to tell.
For now, I'm going to keep using the Mazda filters, but I'll be interested to see what others do.