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If it was a gimmick then the pictures of the inside of the filters on page one wouldn't have anything stuck to them. The oil may have already circulated through the engine etc., but with the Filtermag it didn't go back around again. Oil filters only filter down to so many microns and if a sliver or shard is smaller than what the filter can filter out, back around it goes. For about a nickle a day (over 5 years) I think I'll stick with the Filtermag. Cheap insurance if you ask me.
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