I'm getting to the point where I'm making too many mistakes. I guess I need to stop adding to the posts.
The micron rating for a bypass filter is 5 micron. I said (23) above which is not correct. Sorry about that.
Fram C4P (with gasket) and C4 (no gasket):
5 micron
4.87 Height
4.328 Outer diameter
0.5 Inside top and bottom (seal)
WIX 51100
5 micron
5.0 Height
4.0 Outer diameter
0.55 Inside top and bottom (seal)
Whatever cartridge you use needs to seal good and is manufactured as a "bypass filter".
A little history:
AC Delco oil filters were made by the GM subsidiary. The sell off goes to Honeywell, Champion, Fram to Rank Industries to Trico Group.
WIX filters originated at Gastonia, NC USA then became part of the German company MANN+HUMMEL.
You can almost bet that all these companies outsource our filters to Asia.
Last edited by buoymaker; 08/10/2022 3:22 PM.
