Nyyankees3511 wrote:Id go with iridiums eventhough they are a lot, but a sticker on my hood says to use dual electrode only.

My thoughts on Spark plugs is that you should pick the plug with the most spark.

The experience I felt with multi electrode/ ground prongs designs is that they benefit the DOHC to SOHC design engines. Mostly in the area of long term durability/ service life compared to regular single electrode plugs. For instance the Bosch+4's, had a faster reaction time compared to the single Denso Iridiums. However, the Denso's seemed like they were more efficient because of the better fuel economy I received with them. The only thing I didn't like about the Denso's Iridiums was that they had a very small electrode tip compared to the NGK ones. When it came time for another plug change, the Denso electrodes tips were pretty must gone and packed with carbon build up. Mostly in my case, the car ran too rich. Anywhere, there you go. You can basically run any plug you want. As long as you get the proper size plugs, insulator depth (ceramic jacket that wraps the electrode) and most importantly the right temp plug. Just remember, not to cold of a plug. Because you’ll have a heck of a time starting the car in the winter months where the temperatures reach 35 degrees

(depending on where your located).
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