2021 Mazda MX-5 2.0L, Factory Fill 0W-20, 3800 miles, 12 months

[himemsys]

Not an automotive engineer, but I can’t see how an ADBV would be detrimental to this engine with its bottom mounted filter that is comically small. Also don’t see the harm in not having one. Perhaps someone more technical minded can chime in?

I'm not either, but I did have some folks on here tell me awhile back that some cars have them built into the engine, so don't "require" one. But I was also told that if the one in the engine gets stuck or sludged up, then it's pretty critically that the filter should have one as a backup.

 

[dnewton3]

Well someone better let the other filter makers know ....
Fram variants of 6607 have ADBV
Purolator variants of (L)14612 have ADBV
Bosch 3300's have ADBV
Baldwin B1400 has one
etc