I just blame the dog.Gas leakage ? That's a new a issue
I undergap my plugs by .005.Pull one and look.
Iridium plugs can last a long time. However as they age they require more current to jump their gap, which is definately harder on the coils. The coils then run hotter.
How hard is it to change them? I have gone 105K on my Nissan's which is the spec, but the last ones I did - I did early and they were more fouled than they ever have been in the past - meaning maybe my older engine is now not burning as clean or maybe the coils are getting weak, so my truck I will be doing at about 70K or so.
Just change them and move on with life. The 2.4 is so easy to change them. It will probably take 15 minutes. I just changed them on my dads Kia Sportage.the 2017 Hyundai Sonata spark plugs are original stock when new - despite age , the Hyundai just turned 50K miles and I only use top tier fuel , gets a bottle of Techron twice per year and I keep the PCV valve clean . Driving is mixed , mostly large city suburban driving and some highway driving and work is a 40 minute drive one way . Fairly typical driving pattern . Supposedly , stock iridium spark plugs can go 100K miles but I am thinking at 60K + miles and 7 years I may wish to change early . My concern is if I wait too long there may be a negative impact to the coils (which are more costly to replace) .... Your thoughts and experiences if replacing spark plugs a little earlier is better than waiting the full 100K mile mark ?
Sounds familiar to me.....Jump over a dollar to get to a dime.Typical Corp. pennywise and dollar foolish.