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Jboyette is correct. You could also use [http://www.auto-rx.com/index.html Auto-RX] to help with Sludge Issue's. I've heard nothing but good things about it. Good Luck and Remember.
Change Your Mind, Not Your Oil.
Use the First In Synthetic Motor Oil's.
See My Bio For Information & Contact Details. Brown? if it is a dark brown, nothing. Normal wear and tear. Actually a brown carmel color would indicate a very clean and good running motor. if it is black, then the motor is dirty with 'sludge' and the best way to clean that out is to run the car for about 10 miles on an interstate, change the oil while hot, and do it again 2 or 3 more times, including the filter, to ensure all the sludge is out of the engine.

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Q: What is wrong with your motor if your oil looks brown?
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