I've shown many examples of the ISO 4548-12 test data that shows oil filters always decrease in efficiency as they load up. The only time the efficiency goes back up is right before they are almost totally clogged, and by that time the filter bypass valve would be opening or about to open. And that's not the point of loading you want any oil filter to get to anyway.Nor do I think he would misconstrue or misunderstand something as simple as "The same principle that applies to air filters, applies to oil filters; they increase in efficiency with loading, up to a point". Is LSJR a simple minded idiot? Does he not understand the testing and the science?
Ascent's ISO efficiency testing went until the dP across the media was 8 PSI above the new filter, and the efficiency of all the filters he tested continually went down over that entire 8 PSI of dP increase across the media from debris loading. The more efficient the filter was, the less its efficiency decreases with loading because they shed less already captured debris than the lower efficiency filters. There has not been one piece of ISO efficiency test data that has shown any oil filter increases in efficiency as it loads up with debris.
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