Posted by e on December 02, 2008 at 21:57:08 from (69.130.251.42):
In Reply to: Oil filters revisited posted by Brian Jasper co. Ia on December 02, 2008 at 17:21:26:
Interesting, but..........
How well do they filter? What is their multipass efficiency? That's what really matters at the end of the day to your engine.
As far as the springs, the only thing they are in there for is to take up the tolerances when the can is crimped to the nut plate. Once flow is commenced, pressure forms the seal against the top cap.
The Wix isn't a bad filter. They run around the upper 80's for multipass efficiency. I personally run Fram Toughguards since they are 99% efficient (or are they 98%...I can't remember). The next best are Fleetguard filters with Stratapore.
For media area, more is not always better. If the amount of area really becomes an issue, you have way way bigger issues. The fram is actually better since fewer pleats keeps the media separated. The more pleats there are, the more they have a tendency of sticking together which limits flow area. The best design is the fram tough guard where the pleats are formed along with a wire mesh to keep it's shape.
For end caps, try and pull the fram filter apart. Betcha the media will tear long before the glue looses integrity. The metal end caps with potting compound "look" better to the common Joe, but you are paying for something that really doesn't benefit you.
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