06-02-2008, 08:26 AM
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Half-Ass Member
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Join Date: Jun 2005
Cobra Make, Engine: ERA #732, 428FE (447 CID), TKO600, Solid Flat Tappet Cam, Tons of Aluminum
Posts: 21,897
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Not Ranked
I've always used Moroso. There is a theory that filtering too small of a particle size hampers the overall efficiency of the filter. Here's a quote from the Moroso site:
Quote:
Moroso engineers have determined, with the help of research performed by filtration technology experts, that particles smaller than 20 microns in diameter are not large enough to produce engine wear. Furthermore, Moroso engineers have also found that filters with extremely low micron ratings create an excessive pressure drop across the filter. They can be so restrictive that the filter by-pass valve can open. And with the by-pass valve open, NO FILTRATION occurs, and you have no way of knowing!
To maximize filter performance, Moroso Oil Filters have a rating of 27 microns, which produces a maximum initial restriction of only 2.5 psi when tested to SAE j806! The result is less pressure drop, more flow, less oil by-pass and maximum filtration...
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