Local parts supplier just told me the oil filter for a 12A rotary is the same as the oil filter currently specified for the Miata. Can anyone confirm of deny this? Thanks

 

Would make sense. Same filter as most of Honda's vehicles as well.

 

yep they use the same filter

 

B6Y1 filter works on pretty much any "non-ford" mazda up to 2003. i have had 626s, rx7s, miatas, proteges all which use the same filter.

 

This seems to depend on the brand. Some call out the same number for RX-7 and Miatas, other such as Purolator specify different filters.

 

purolator is wrong. if you look it up in the Mazda catalog, both cars use the same filter.

 

Will also work on almost every honda, nissan and subaru product as well

 

I'm not sure Purlolator is wrong. It could be that Purolator is exceeding OEM specification on the RX-7 filter. The filter Purolator calls out for 80-92 RX-7s (79s are a different number and FDs use the same number as a Miata) has a bigger diameter can than the Miata filter. The sealing surfaces are the same. I am assuming the RX-7 part number has a larger filter area because of the larger diameter. I have assumed, but never tried to verify, that the bigger diameter filter wouldn't fit on a Miata. I have used the RX-7 number on my '80 based on the assumption it would filter slightly better and/or have less pressure drop than the Miata number. Mazda calling out the same number (based off the foxed.ca parts manuals which may or may not be up to date 79s might get a different filter) may be more for cost savings than performance reasons.

At then end of the day my guess is I could use the Purolator Miata filter on my 80 RX-7 and never know the difference. It is also possible that Purolator is wrong. If someone has facts that show Purolator is wrong please post them. I don't consider Mazda using the same number for multiple vehicles proof that that is the optimum setup. To me it indicates that was determined to be the most economical solution for Mazda.

 

Mazda built the cars, their parts catalog is correct by default. actually if you really want to get nit picky, Mazda has the oil filter change designs a couple times over the years, so there are some different part numbers in their catalogs, but they all supersede to the same B6Y1 part number now.

 

Yes its the same B6Y1 are used on at least 10 different cars. G6YO oil filter will also work on any B6Y1 car assuming there's enough room.

 

Every Mazda I've owned has had interchangeable oil filters. One thing I caught onto a few years ago was:
A filter out of a 2000 626 fits an NB Miata, a 3rd gen Protege, and a 2nd /3rd gen RX-7, but it's about 1/3 bigger than the stock ones (which are all the same size).

I've been running 626 filters for years with absolutely no problems. Wix is the brand I buy.

 

Side note - are you the guy who went by eggynatey on mazdas247 a few years ago?

 

That's me.. I remember you too. How's it going?

 

good man, good to see you're still brand loyal so few of us "old timers" running around