RE: Higher octane??

["Gary H." <62to65mopar@xxxxxxxxxxx>]

Cooler plugs are those wearing sun glasses. LOL  Just kidding.

Actually it is a plug with a lower heat range. "Heat range is the speed at which a spark plug can transfer heat from the firing tip to the cylinder head water jacket and into the cooling system."
Summit has a good article about heat range in spark plugs.
http://www.summitracing.com/expertadvice/storydetail/techarticles/Spark-Plugs-101-Understanding-Spark-Plug-Heat-Range/

Thanks,
Gary H. 

>  -------Original Message------- 
...
>   What do you mean by cooler plugs?
   ...

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