After how many miles should u change your spark plugs? Iridium plugs last 100k miles?

I often get different answers as to how many miles your spark plugs are good for. I keep hearing that the iridium plugs last 100k miles but this seems a lil hard to believe, how true is that claim?After how many miles should u change your spark plugs? Iridium plugs last 100k miles?
are they gaped properly thats all you need to knowAfter how many miles should u change your spark plugs? Iridium plugs last 100k miles?
The plugs will be fine the problem we find is a lot of the time the spark plug wont come out. I suggest to replace at 60k just for that reason, and have anti-seize on the threads and then dielectric grease to the spark plug boot to keep moisture and water out, also ads to boot removal next time.
It depends on the motor and im not sure about iridium plugs but Platinum plugs have been around for years....I have a 1999 suburban that came with Platinum plugs, GM recommends replacing them at 100k........I have 151,000 on them....no misfires, but they probably dont look too pretty : )
40,000 to 50,000 miles. Before you buy Iridium plugs ask for the 100,000 mile warranty.

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