Hey guys, I was about to replace the plugs in my 2020 as they are the original with 50,000 miles on them. I picked up a set of Motorcraft from the dealer “part SP-594” and I noticed this thread and basically the NGK plugs are the ones most recommended. My question is about the temperature range, what is the benefit of running one step colder? This is something I have never been concerned with and just wanted to know if a step colder is better than what Ford has spec for the vehicle. I have a Tune but am currently running stock to help MPG, I have a VERY HEAVY FOOT with the tune on. If anyone could answer this I would be greatly appreciative…. Wouldn’t need a long explanation, just a short to the point type explanation please. Thank you in advance