Oil filter AC DELCO or OEM Mazda

I also use an ACDelco filter (blasphemy, I know).

I personally do an old and filter every 6-7000 km. I do it so frequently because, 1) I do it myself, so cost is down and I make sure the job is done right. 2) the sky active engines are known for carbon buildup, so more frequent oil changes should help. 3) Longevity, I want to see 300,000 or more on the dash one day.

People like me on the other hand are going for synthetic oil and Mazda OEM filters but still need to get an oil change at 5000 miles.

An oil change with decent full synthetic is 30-40$ for 5 quarts + OEM filter for another 5-10$. It's relatively cheap to do every 6-8 months to know it always has decent oil, and no problems should arise.

Absolutely not. Example, I was an equipment manager at a Petroleum tank company. On our generator I tried to use several different manufacturers and the all blew the seals out because of filter material and pressure valves they used. I ended up buying OEM filters and never had a problem after that.

I'd go with the OEM Mazda Oil Filters but any high quality synthetic 0w20 will work fine.

I’ve always used the OEM filter and Kirkland 0W-20 oil on my 2013 Skyactiv because I remember reading on the forums that due to the high compression of the engine the Mazda filter is specialized to handle that. Not sure if it’s true but no problems yet on 7.5k OCI.

OEM for the engine oil filter.

The Miata is pretty easy to work on. But ironically, one of the simplest jobs is a major PITA, changing the oil filter The thing is buried underneath the intake manifold.

For oil filters I feel like the ACDelco filters are pretty low quality and there are many better options. Mobil and K&N oil filters are available at Walmart for $10-15, made in USA, and seem to be much better quality.