I just typed "ruthenium" in the search bar to "Search Community" and came up with a lot of hits. Second on the list is a long thread (74 posts) detailing one member's experience with input from numerous others. Not sure what you searched for but come on. It's not hard.
I put NGK Ruthenium spark plugs in the search and just kept showing spark plugs, nothing to do with ruthenium, but I'll just type ruthenium in and look at the threads, thanks again dude, maybe I should just shorten my search
Yah I'm only at 60k right now, just looking for when it comes time to do them which would be best and I'm just gonna stick with the OEM NGK's, on a side note I did get new tires installed today, 285/60r20 Duratrac's and love them so far
If you check with NGK, they recommend the original iridium and the new rutheniums. Price difference is a dollar or two a plug, so not significant. The advantages of ruthenium are detailed on the NGK site. The reason they're not the OEM plugs is because ruthenium is a newer technology than the Gen1 Titan (and wasn't available when the Titans were designed).