I will be changing my spark plugs in the summer with the Ruthenium LTR6BHX-PSPE from Iridium LTR6IX I have now..
I always believe in getting the best whether it's over kill or not.
It's like running Hi-Test, you don't need to but the extra HP and fuel economy, keeping things in the combustion chamber, Cats and O2 sensors clean pays for it's self in the long run.
So if I don't need to change them as often and I get better performance how ever slight it might be, I'm good with it.
Also since I'm Supercharged the recommended gap is .28
And I've seen Tuners say .28 to .30 on a Tuned 6.2L will minimize misfire and and make it run smoother.
I just learned something about our dual spark plugs.
I always wondered why the spark plugs look different when pulling the old ones out. It's good reading. Waste Spark Ignitions | NGK Spark Plugs