Copper or alum. oil plug washer?

AlanS · Post by **AlanS** » 20 Oct 2018, 14:13

2006 xc70- I inherited about 2 dozen oil drain plug washers. A mix of copper and aluminum. Is one preferred over the other? Are they the same size as any other washer on the car (Trans, rear, etc.)? Oil change tomorrow, just want to use the right washer.

Post by **jimmy57** » 20 Oct 2018, 16:57

I have used both for ages and I have never seen a difference. AT least for oil pan. The other things that have oil in them but are rarely, if ever, unscrewed might be different in areas with road salt. Those other things (diff, angle gear, AOC) are mostly another size other than oil drain plug.