Just my .002 worth. Just like your home HVAC unit, the less stress you put on the blower motor the better. An HVAC pro known and trusted in my area says "
buy the cheapest filters you can find, and replace them more often..." I would think HEPA or other similar filters in a vehicle might not make sense since as soon as you open the door the air exchange is almost immediate with the outside air, in your house the air exchange is far less.
Anyways plenty of options for plenty of price points. This post might be of help:
I am a recent 2019 CX-5 Signature owner (November 2019). I found a few online resources [like this forum] and immediately started to learn more about the vehicle. For me modifications are a way of life as a vehicle owner and so I quickly went down the rabbit hole of all various pieces and...
www.mazdas247.com