See this post . WIX oil filter? 3.8
It says 3.8 but is a discussion about spin on filter for your housing. There’s a link to a long discussion on the etypeuk forum which includes opening up filters for a comparison. To me the branded JAG EBC 9658 was superior.
Here’s a link to the uK forum. Hope it works.
https://forum.etypeuk.com/viewtopic.php?f=3&t=16097&hilit=oil+filter+housing+XJIII
My post #42 with comments and destruction pictures on a Jag, Hengst, WIX, and Hastings. With some comments on some others.There were some that thought it not useful. I thought it was just a simple comparison that seemed to be valid and informative.