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International Automotive Technicians Network
Re: 4.2L Fouls Spark Plugs
Posted to Technical Discussion Forum on 7/16/2013

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10W-30 oughta do it. If you just ball honed it 5w-30 might even be better, but I'd change it to 10W-30 like OEM within a few miles. I always try to break rings in by driving immediately, part to mid t... Login to read more.