Timely thread as I just performed my first oil change on the 4.8is.

I also managed to tear the o ring somehow during installation. First time that has happened in 17 years. Not sure where it went wrong but I must not have had it in the obvious groove but rather slightly above or below it. It was lubed up but still leaked like a mofo on testing and was clearly torn upon removal.

I installed the filter up into the filter housing first, prior to installing the filter cap. Looks like some of you guys install the filter into the filter cap first and then install them together. Is there a consensus on which method should be used on this motor?

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2004 4.8is
2004 M3 SMG
2003 E55 Kleeman Stage 3