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Q: engine sludge on 1997 Lexus ES300

what should be done to remove sludge buildup in engine
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There was a court settlement by Lexus regarding engine sludge a few years back; research it and you may come across the terms of the settlement. Hope it works for you. When your engine is clean use only synthetic oil. I have used Mobil1 synthetic in our 1997 es300 since 22,000 miles. It now has 98,000 plus and I have never had a problem. Good luck.
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