[Wayne 962]

The spin-on filter and the Porsche warranty may be a sticky legal issue. From a technical point of view, I see no problem with it. I can't recall off the top of my head the issues with bypassing the filter, but I do know that Callas Rennsport has seen these cheapie filters fail and then clog the engine (on a Cayenne). They are probably fine if you change them every 3000-5000 miles and use high-quality filters. Still, the Mobil-1 filters seem to me to be a more robust solution, but that's just a gut feeling.

-Wayne