copper crush washer vs aluminum

["Craig D. Niederst" <niederst@telerama.com>]

I finally got that damn drain plug out and went to the dealer (Day Audi)
over lunch today and bought a new drain plug. I was issued an aluminum crush
washer with the plug instead of copper. I questioned the parts manager, and
he told me that this is what Audi has been sending them. He said he hasn't
seen a copper washer in a couple of years. He said they only use these
aluminum ones on the Audi's they service. I remember a while back that a
lister mentioned aluminum washers were detrimental due to the metal types
not being compatible (i.e. oil pan metal and aluminum). I have already
installed the new washer, and changed the oil. Was this a mistake to use the
aluminum washer? TIA.

Craig
'92 100S (71k)

Craig
'92 100S (71k)