Interesting, I haven't been able to find any pictures of an unopened sump but the OEM (from BMW) oil filter replacement kit comes with a copper crush washer, as do most 3rd party kits. It appears there is a couple of different filters used in the B57 with AUS and EU using different ones, part number and manufacture location at least, though I'd assume they are interchangeable and they could use different crush washers depending on market.
I've bought a Ryco oil filter kit to have my service redone by an independent, it was their recommendation having worked on these engines in BWMs, they said the BMW filter can disintegrate when you goto remove it and a quick search of the net backed up this claim. They also said Ryco guarantees their filters to be OEM quality or better so will cover damage done to the engine if something fails and it's found to be the fault of their oil filter which gives confidence.
There's also a good thread in this forum that looks at the available filter options in AUS (as well as showing the 2 different BMW options depending on market) and gives a review of each, Ryco were the only one to provide a filter rating, thanks to
@TheDocAUS for putting this (and a lot more information) together!
BACKGROUND This post is in two parts. Part 1 lists possible third-party suppliers of oil filters for the INEOS Grenadier B57 Diesel Motor (the oil filter is also used on the B58). Part 2 looks at some third-party oil filter available in Australia. It summarises some basic features with a view...
www.theineosforum.com