Join Date: Dec 2014
Location: Boston, MA, USA
The mesh filter should be checked every other oil change. It is screwed in - a 12 or 14mm allen.
I'd change the crush washer every time - no need for any sealant. It's probably fine, but keep an eye on it for a while.
I was recently told that the OEM filter has special valving because of how ducs handle oil pressure at idle. I'm also using HiFlo, but will go OEM at the next change.