Today I replaced the spark plugs on my 2005 Saturn Ion. They are original to the car with 234,000 miles on them. Well, they definitely look like they needed to be changed. The electrodes on 1 and 3 are worn down to the porcelain. The OEM plugs were double platinum AC Delco but Autozone only had the iridiums, so I now have AC Delco iridium plugs. Here's some pictures of them:

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