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Old Ironsides
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Lifetime Member
Supporting Member
Don't believe you're missing anything. I have the original plug in my 09 Polaris with 5K miles on it. My trucks go over 100K without changing plugs.
I have an '07 Cobalt at 299k. Still has original spark plugs in it. Was going to switch them out at about 150k, just as preventative maintenance. Was asking my mechanic what plugs to go with and he asked ' why, what's it doing '. No problems, just seems logical...if it ain't broke don't fix it!