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have 2007 silverado 4.8 4wd wondering about e3 spark plugs to replace stock .has anyone installed them?

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e3 plugs

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e3 plugs

Postby dmacram11 [OP] » Feb 29 2012, 11:09pm

have 2007 silverado 4.8 4wd wondering about e3 spark plugs to replace stock .has anyone installed them?
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Re: e3 plugs

Postby adams99z71 » Feb 29 2012, 11:25pm

yeah a few guys on here have, the general consensus is that they work well for about 5,000 miles then degrade to junk a week later. for best results and longevity most people use the factory replacement iridium plugs. i dont know if ac delcos, bosch, ngk or any other brand of iridiums is any better than the other but which ever ones you go with you should be satisfied.
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Re: e3 plugs

Postby BuxCamper » Mar 02 2012, 6:21am

I've seen one person on another board say the NGK replacements were doing fine over 30K later. But it seems GMs engines just don't like any fancy style plug. The closer to OEM the better.
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Re: e3 plugs

Postby dmacram11 [OP] » Mar 03 2012, 1:52pm

thanks thats what i thought tried splitfires once in a 90 s chevy didnt like em very well thanks
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Re: e3 plugs

Postby EKinMN » Mar 03 2012, 2:23pm

See this discussion for more info: Spark Plugs
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