Oil filter with good quality doesnt mean it meets Mazdas unique high-flow specification for SkyActiv-G engines. According to Mobil 1 website, M1-108A oil filter is compatible with many other filters including both Mazda OEM B6Y1-14-302A and PE01-14-302A filters unfortunately Mazda USA has said conventional B6Y1-14-302A filter cant be used on SkyActiv-Gs due to different specs. A single filter definitely cant meet the requirements of 2 filters with different specs.
Skyactiv Oil Filters
So you are claiming the Mobl1 filter is defective and will not work properly on a Mazda engine?
That only a Mazda oil filter will work ?
I find that hard to believe.