Hello. 24k on my 2018 Limited. Had a couple instances of “stumble“ and a little bit of a rough idle. Completely stock except for a catch can. I’m going to do a plug replacement with the Ruthenium as recommended. I was wondering why the one step colder plug NGK 95605 is recommended for a stock set up instead of the normal heat range NGK 90495. Some short trips, but 80% longer trips and 35% towing, some light and some 7000 pound towing. Very light use overall, but she was manufactured the third week of October 2018. Just days away from being a 19. Will the colder plugs keep my cam phasers, turbo wastegate, and shocks from going out? Seriously, I’ve just lost two front shocks, and replaced the battery with an interstate for some weird electrical glitches that are now solved, so she has been a good one. I feel pretty lucky so far…