This is a Suspect A01 from Amazon. See:
https://www.bobistheoilguy.com/foru...m-a01-or-am-i-being-paranoid#Post4984055
The discoloration appears to be some sort of oil, probably a corrosion inhibitor.
Examination under magnification it appears the line between the diamond and the dot may be a tool skip or drag.
I believe this filter is genuine.
https://www.bobistheoilguy.com/foru...m-a01-or-am-i-being-paranoid#Post4984055
![[Linked Image] [Linked Image]](http://www.rangerxlt.com/images/forums/vehicles/Civic/Metfanant/MowerPartsman15400-PLM-A01a.jpg)
![[Linked Image] [Linked Image]](http://www.rangerxlt.com/images/forums/vehicles/Civic/Metfanant/MowerPartsman15400-PLM-A01b.jpg)
![[Linked Image] [Linked Image]](http://www.rangerxlt.com/images/forums/vehicles/Civic/Metfanant/MowerPartsman15400-PLM-A01c.jpg)
![[Linked Image] [Linked Image]](http://www.rangerxlt.com/images/forums/vehicles/Civic/Metfanant/MowerPartsman15400-PLM-A01d.jpg)
![[Linked Image] [Linked Image]](http://www.rangerxlt.com/images/forums/vehicles/Civic/Metfanant/MowerPartsman15400-PLM-A01e.jpg)
The discoloration appears to be some sort of oil, probably a corrosion inhibitor.
![[Linked Image] [Linked Image]](http://www.rangerxlt.com/images/forums/vehicles/Civic/Metfanant/MowerPartsman15400-PLM-A01f.jpg)
![[Linked Image] [Linked Image]](http://www.rangerxlt.com/images/forums/vehicles/Civic/Metfanant/MowerPartsman15400-PLM-A01g.jpg)
![[Linked Image] [Linked Image]](http://www.rangerxlt.com/images/forums/vehicles/Civic/Metfanant/MowerPartsman15400-PLM-A01h.jpg)
![[Linked Image] [Linked Image]](http://www.rangerxlt.com/images/forums/vehicles/Civic/Metfanant/MowerPartsman15400-PLM-A01i.jpg)
![[Linked Image] [Linked Image]](http://www.rangerxlt.com/images/forums/vehicles/Civic/Metfanant/MowerPartsman15400-PLM-A01j.jpg)
![[Linked Image] [Linked Image]](http://www.rangerxlt.com/images/forums/vehicles/Civic/Metfanant/MowerPartsman15400-PLM-A01k.jpg)
![[Linked Image] [Linked Image]](http://www.rangerxlt.com/images/forums/vehicles/Civic/Metfanant/MowerPartsman15400-PLM-A01l.jpg)
Examination under magnification it appears the line between the diamond and the dot may be a tool skip or drag.
I believe this filter is genuine.