Between the FS2500, Amsoil dual bypass, Frantz, and centrifugal (Spinner II), which would you say is the best? I'm thinking the Spinner II.

 

You will NOT find a better filter than the 'FS2500' BUT its awful EXPENSIVE
check out this link 'One of our brothers here at DTR posted' outstanding job

https://www.dieseltruckresource.com/...d.php?t=131836

 

BS. Here's how to do a "real" bypass filter, ode skoo:

http://72.19.150.167/PhotoAlbum/Cars/Pics/CDT_16.jpg
http://72.19.150.167/PhotoAlbum/Cars/Pics/CDT_17.jpg
http://72.19.150.167/PhotoAlbum/Cars/Pics/CDT_18.jpg
http://72.19.150.167/PhotoAlbum/Cars/Pics/CDT_19.jpg
http://72.19.150.167/PhotoAlbum/Cars/Pics/CDT_20.jpg
http://72.19.150.167/PhotoAlbum/Cars/Pics/CDT_21.jpg
http://72.19.150.167/PhotoAlbum/Cars/Pics/CDT_22.jpg
http://72.19.150.167/PhotoAlbum/Cars/Pics/CDT_23.jpg
http://72.19.150.167/PhotoAlbum/Cars/Pics/CDT_24.jpg

and the UOA to prove it:

http://72.19.150.167/PhotoAlbum/Cars/CTD_May_07_UOA.pdf

Those Amsoil spin-on filter elements are expensive. Filter change on my Gulf Coast costs about .90 (3 rolls). I think the results speak for themselves.

 

^That looks sweet. But $600?! I just checked up on it. Looks a lot like the Frantz design. Are the filters a rolled paper type?

 

I found it on eBay for like $325 or something, as I recall. Using plain old paper towels. You'll have more than that in Amsoil replacement filters after a few years. I like to think long term and prefer not to pay more $$ for more engine wear the scAmsoil way.

 

Ace - any chance you've got those pictures rehosted somewhere else?