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Spark plug change interval

 
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Old 12 Jul 2008, 12:37 pm
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Default Spark plug change interval

Hey fellas,

On 12/27/06 I changed the spark plugs and wires to Bosch premium wires and Bosch platinum +4 plugs.

The mileage then was 44,880 and I currently have 56,411

That is 11,531 on that set of plugs and wires.


Is it time to change them?
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Old 12 Jul 2008, 01:15 pm
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Default Re: Spark plug change interval

Normally Platinum Plugs will last many miles, I checked mine at 44K+ miles and they still looked good, gap was still .04 and I had no stumble or shuddering.
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Old 12 Jul 2008, 01:50 pm
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Default Re: Spark plug change interval

Quote:
Originally Posted by Hooligan View Post
Normally Platinum Plugs will last many miles, I checked mine at 44K+ miles and they still looked good, gap was still .04 and I had no stumble or shuddering.
you mean .040 I hope

The book says to change factory plugs every 30k. Hooligan is right about the platinum plugs. I have Bosch double plats in my wife's '04 PT and I just changed them to new Bosch double plats after 65k miles of use. The car was still running strong with 65k on the plugs, but I decided to change them anyways when I replaced the valve cover gasket and the spark plug well gaskets.
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Old 12 Jul 2008, 06:00 pm
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Default Re: Spark plug change interval

Quote:
Originally Posted by Mean Green View Post
you mean .040 I hope

The book says to change factory plugs every 30k. Hooligan is right about the platinum plugs. I have Bosch double plats in my wife's '04 PT and I just changed them to new Bosch double plats after 65k miles of use. The car was still running strong with 65k on the plugs, but I decided to change them anyways when I replaced the valve cover gasket and the spark plug well gaskets.
In my signature, it states .040, sorry for the misinformation.
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Old 12 Jul 2008, 07:06 pm
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Default Re: Spark plug change interval

My experience w/2 PTs (and 2 more, counting my daughter's and son-in-law's GTs) - is that the wires go before plugs. Get good wires (Cranes) and you're good for at least 40,000 miles.
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