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Old 09-18-2007, 09:43 PM
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onebadmerc onebadmerc is offline
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I run 5w30 in my 2002 Ranger that has a 4.0l V6, I would think 20w50 would be a little bit to heavy for your engine. I know Ford doesn't recommend anything heavier than 5w30 in most of their new cars and trucks. There might be something else going on with your engine.
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