I like copper oil plug washers. Have used them on about every car I have ever owned—until my first Vanagon, a new 1990. Came with aluminum from the factory. Dealer supplied me with aluminum washers for a few years. Started buying parts for all my VWs at a local shop I still use. They spec aluminum. So, I was surprised by all this at first but never had a bit of problem with either material, copper or aluminum and doubt if I ever put a copper oil plug washer on a Vavagon come to think of it.   
  

  
Jim
  

  
  

  
  
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> On Aug 31, 2019 at 6:09 PM,  <Karl Mullendore (mailto:tdiguru@westyventures.com)>  wrote:
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>  That's a lot of $ for a crush washer. I pay 13 cents US from my parts supplier. FWIW, back when I was still doing customer service the proper gasket was aluminium, has that changed?  
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