I have used a frantz filter on my 2001 Jetta, 1.9L ALH
I put close to 10000 miles on one in my 01 Jetta ALH, it started leaking a couple drops in the driveway from the main cylinder clamp, so I pulled it I should have opened it up and changed the media and troubleshot the leak. I liked the way the oil looked while it was on, a cleaner brown not much soot, dark like coffee. Initial set up was a pain finding a place to mount it in our spacious engine compartments.