Spark Plugs at 85888 miles

[TwizzleStix]

Just decided to replace them because about to head out on long road trip. They are the original plugs from 2018 at new vehicle purchase. I tuned the truck within 1500 miles of new, so 80+000 miles on them. Never had a, not even one, misfire event while laying down many 12.5sec 1/4 mile passes and 140mph top speed runs. You know, just sayin the Ford iridium plugs are pretty good and those people replacing plugs a lot are doing it for fun, running bad fuel, or a bad tune.

They all measured 0.33” gap, except cyl 1 was 0.35”. I checked the new ones set to 0.30” and all is well. Pic of old plugs

 

[JohnyPython]

Nice. I’m assuming you’re running premium.

My plugs didn’t look bad @60k miles. Gaps were good and colour was consistent. I did one step colder. I run 94 all the time.

It’s just nice to know the truck is ready for a road trip.

 

[thatJeepguy]

Looks good for milage.

 

[stevenstommyboy1]

Those are the new ones

 

[Sage]

You're only showing 6 plugs, where's the other 10?

 

[Space Ghost]

Funny mine pretty much looked the same as yours at 35k and at 60k

 

[hunter031789]

Mine look pretty similar and have 90k miles on them.

 

[TwizzleStix]

Yep, obviously I could have run them for much longer, but I just changed all the fluids, and decided this point, why not? I still have the new set of 552 colder plugs that were a “scientific consensus” must-have if tuned way back at least 6 years ago, but actually are not needed AT ALL.

 

[hunter031789]

Yep, obviously I could have run them for much longer, but I just changed all the fluids, and decided this point, why not? I still have the new set of 552 colder plugs that were a “scientific consensus” must-have if tuned way back at least 6 years ago, but actually are not needed AT ALL.

I was really concerned with 90k miles as Ford change interval tops out at 100k and all the Internet advice says Ecoboosts are hard on plugs. Looking at the plugs in this thread I don't know how anyone can conclude that the plug life is much different from most other engines.