I'd go with the OEM Mazda Oil Filters but any high quality synthetic 0w20 will work fine.
Pros: high quality
Vehicle:
Mazda 3
Best Oil filter for Mazda 3
[The filter was this](https://m.autodoc.co.uk/bosch/11156545)
You could do another oil and filter change to see if it was that or if the oil was just a coincidence.
Vehicle:
Mazda 3
0w20 Mobil one synthetic and Mobil one filter since 50,000 km to now 205,000km on my 2014 mazda3. Engine runs great.
Pros: engine runs great
Vehicle:
Mazda 3
Mileage: 205000 km
I do use Mazda filter rather than aftermarket.
Pros: better than aftermarket
Cons: more expensive
Vehicle:
Mazda 3
I use Mobil 1 synthetic 0w20 with Mobil1 M1-209 screw-on filter for the 2012. I've been doing this for these cars since they were new. We don't put too many miles/year on these cars and so I change the oil every fall and every spring. Never had a problem.
Pros: no problems
Vehicle:
Mazda 3
Part number: M1-209
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