OK, we've had this discussion here before about using precious metal spark plugs in the later model hemi's, and we hear the warnings about how they don't work in the later hemi's. I don't think I've heard the bottom line, technical issue why they won't work explained here fully, but that seems to be the answer. I just did another search of this forum for the term "spark plugs" and didn't get anything new. Being that the hemi Charger police car runs precious metal plugs, I've still wondered why the other later hemi's allegedly can't.
I went to the Dodge Ram site, and tried to find some search results that might address something more about the spark plugs in the hemi...when I found this.
Now, I haven't pulled a plug out of my '12 Express to verify this, but doesn't that white info bubble pointing at the 5.7 hemi in this 2012 Ram 1500 segment say "platinum-tipped spark plugs"?