2013 spark plugs, I assume these are the stock plugs. 98k on the clock. They don't look terrible to me? #8 was the worst. What do y'all think? The first picture is left to right, left being front of car.

 

I would Say Looks Ok For Mileage to Me!

I would Put in Some Fuel Additive and Fomoco Likes to Recommend This!

https://www.chevronlubricants.com/en...m-cleaner.html

Put Er In and Let Er Rip Tater Chip!

Happy Motoring!

KC

 

They appear to look in good condition to me as well... I would also recommend fuel additives, just as Kevin mentioned above!

 

What's the deal with the #8 cylinder having particles and gunk all over the threads and electrode? The other 7 cylinders didn't have much if any of that.

 

Might Have Been A Little Loose and More Gunk Got through. I don't Believe it's of Any Concern. The Fuel Treatment Should Clean out the Carbon over Time. Should Use Every 3k they Say! I would Say Every Oil Change Pop in A Can. Easy to Remember That Way!

That Particular Treatment Also Cleans Fuel Card In Tank to Help Keep from Having Fuel Sender Problems & Gas Gauge Issues!

KC

 

Cylinder 8 is the one that has "issues" if I remember correctly .... I thought it was marginal cooling and/or oil flow in some of the earlier Coyotes .... not sure how that would be contributing to that gunk though