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Old 10-22-2013, 08:29 PM
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dodge dude94 dodge dude94 is offline
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Join Date: Jun 2012
Location: East Texas
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Default Re: Diamond Fire E3 spark plug

Originally Posted by maniac57 View Post
Yeah, well I'm old and scared of new things....
just recently got used to these newfangled cordless phones!
Seriously, I prefer stuff I KNOW works over untried gimmicks and I have used platinum so I feel fine recommending them to others.
Never used Iridium yet, but if GM uses them, it's for a reason.
The main reason automakers are slowly making the switch to iridium is that is lasts like platinum, but doesn't retard ignition timing like platinum does. It allows a better spark, so you can run wider gaps, which acts as a timing advance in a way which increases MPG.
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