Ok. I thought silver was indeed silver. Makes sense it is aluminum.

Good to know I should be using copper. That's what I have now. My local chain store no longer carries the aluminum stuff.

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79 300TD “Old Smokey” AKA “The Mistake” (SOLD)
82 240D stick shift 335k miles (SOLD)
82 300SD 300k miles
85 300D Turbodiesel 170k miles
97 C280 147k miles