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Old 01-11-2005, 05:01 PM
persuazion persuazion is offline
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HOw many miles should I go before replacing all my sparkplugs??

I have a 99 lesabre with 40,000 miles and I have a cracked #6 sparkplug...Firestone wants 35.00 to replace the one..but I was wondering if I should just wait and get them all done for 106.00....will it mess my car up bad driving with one messed up??
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