Mahle is out. Hengst is in.
http://www.renntech.org/forums/index.php?showtopic=9454&hl=unapproved
I have Wix in the car now.
All 3 come with the O-ring. None come with the drain plug washer.
I have reused the O-ring and washer several times, on my car. Also, I have not use a torque wrench on my car for an oil change in years.
My 1997 guinea pig still runs....