I'm staying stock, the Porsche inserts (used to keep warranty in place) are excellent quality. They are very much the same as the inside of the disposables so IMO all you're really doing is creating more waste and making the oil change easier for yourself. Oh and in case anyone is interested 9A1 with 4K on it filter showed zero particles of any sort, looked like a brand new unit only wetted.
Last edited by Ghostrider 310; 05-22-2012 at 06:52 AM.
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