I use cartridge filters in both my cars, where the media is not surrounded by a metal can, making the media visible and accessible. ... Is it possible to buy Synteq media, or maybe whatever Amsoil uses in their bypass filters, just the media? ... I want to take a strip and lay it along the outside surface of my oil filters, glue it on the outside using silicon high temperature rubber, covering only about 10% of the normal media for lower micron filtration in a parallel path arrangement.