Have you ever wondered if that fuel filter you just bought is junk or OK? You can't see inside so how would you know?
It seems that EVERYBODY makes fuel filters-even K&N. What's the real deal with these mysterious metal cans that our engines rely on for clean fuel?
Lets have a look inside!
First off, there is no high flow fuel filter, just filters with more filter media resulting from more pleats or a longer element. They'll all flow plenty of fuel. A filter with more filtering media means it will capture more dirt before it starts to restrict flow which simply means it will last longer.
All these fuel filters have the identical design and filter media. No screens, cotton, fiberglass cloth sheets, nothing that appears to be synthetic.
Left to right:
Fram: Has the least number of pleats.
ACDelco, identical to the Fram but with a few more pleats.
Wix/CarQuest: More pleats again but they seem to be better aligned, more precisely formed.
K&N: Even more pleats than the Wix, highest count of the test group BUT the filter media is shorter. Like the Wix/CarQuest, nicely folded and aligned pleats. My
verdict? Wix/CarQuest wins because with it's full length filter it probably has just as much filter media as the K&N's shorter design AND it's much more easily found and half the cost.
ANY of these filters will perform
the same but their life use cycles vary because some will become clogged with dirt earlier than others.
The blue marks are from marking the pleats as they were counted. Please note: Wix no longer makes filters for CarQuest HOWEVER Wix is now making filters for NAPA.