Badgertits
FRF Addict
You just wasted your time and money. The OEM plugs work perfectly for at least 60k miles running tuned for 59k miles. It's OK to swap out parts to make yourself feel better, but there is literally no NEED. That reminds me, I need to change the oil & filter while swapping the new tires/wheels on!
nah- actually if you’re OCD I’d change em every other oil change 10/12k miles
these tt Ford engines really like fresh cold properly gapped plugs
in the very least I’d change em every 25-30k if you want it running tiptop