Doubtful. Copper plugs do die about 12-15k miles, and I would run AL 606's. I honestly dont have a clue as to what NGK's are for stock and colder plugs.
But losing 120 miles a tank, cant all be blamed on the spark plugs.
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03-17-2012
Doubtful. Copper plugs do die about 12-15k miles, and I would run AL 606's. I honestly dont have a clue as to what NGK's are for stock and colder plugs.
But losing 120 miles a tank, cant all be blamed on the spark plugs.
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