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2018 Alfa Romeo Giulia Quadrifoglio
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Changed my spark plugs out to NGK Rutheniums, gapped to OEM 0.7mm gap. I prefer not having to swap out the platinum plugs on a regular basis...not to mention the Rutheniums will maintain their gap significantly longer than the OEM plugs.
 

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2018 Alfa Romeo Giulia Quadrifoglio
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50 Posts
Also experienced smooth idle after you changed them?


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Yes. I also datalogged my car since I wanted to make sure the gap was correct and there wasn't any spark blow out. 0.7mm seems like such a wide gap for a car that runs 20psi...but it was happy all the way to redline.
 
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