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Good results in Audi A8
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This car is a 2004 A8 4.2L 40v V8 with 125k and a good maintenance history.

This engine would clatter lightly and briefly upon cold start-up... something that I was not terribly concerned about. I suspect valve train noise.

It is now 300 miles into the rinse phase and I just happened to notice the other day that this start-up clatter has completely disappeared!

ARX Plus is great stuff!

Mike



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