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    Cleaning Sludge from Under Valve Covers

    I just pulled my valve covers off of my 1999 Ford Mustang today and I see what I believe to be sludge. How should I go about fixing this problem. I change my oil literally every 3,000 miles sometimes even before using Castrol GTX High Mileage 10W30. The car currently has 196,500 miles on it. I...
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