Spark Plug replace 58,000 mls
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Join Date: Feb 2014
Location: Adelaide, South Australia
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The stock plugs are usually NGK Iridiums and are scheduled to last 100,000 miles or 10 years whichever comes first.
The iridium central electrode is super tough and hardly wears down at all compared to conventional copper electrodes, that is why they last so long.
Also, assuming you have an AJ133 V8 in the car, the rear spark plugs can be a pig of a job to access and especially so on a supercharged version, and then there are the plastic/rubber valve cover covers which from all reports are extremely difficult to put back in place especially on the SC version.
So IMHO at 58k miles and running well I would not bother with a spark plug change.
The iridium central electrode is super tough and hardly wears down at all compared to conventional copper electrodes, that is why they last so long.
Also, assuming you have an AJ133 V8 in the car, the rear spark plugs can be a pig of a job to access and especially so on a supercharged version, and then there are the plastic/rubber valve cover covers which from all reports are extremely difficult to put back in place especially on the SC version.
So IMHO at 58k miles and running well I would not bother with a spark plug change.
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