I saw a similar topic in my searches but did not get the info I was looking for.
I have a very simple question. I’m debating between the OEM NGK 5547 PFR6W-TG (Heat Range 6) and the slightly colder NGK 5592 PFR7W-TG (Heat Range 7)
I’m not tuned at the moment but I for sure drive my car hard. All the time. 24/7 ;D . It also will be getting JHM tune in the hopefully not to distant future so I am leaning more toward the 5592.
For those of you who have replaced your plugs, what did you use and why?
Thanks! 8)