Read my spark plugs 😎

[jj51702]

Copper denso plugs off of a 2007 v6 4runner. Plugs in service for 50k. 150k on the rig. Looks like cooked oil on the threads?

toyota recommends 30k changes on these, I went 50k

 

[2EHA]

i’m not a human wideband but looks like they’ve been working with an optimal mixture

 

[ripcord]

Other than normal erosion of the positive electrodes for the mileage those look fine.

 

[simple_gifts]

Says "DENSO" what am i missing lol.

 

[nwjones18]

They look good to me. It was time to replace them though.

 

[AutoMechanic]

Looks good.

 

[DGXR]

Other than normal erosion of the positive electrodes for the mileage those look fine.

I agree.

 

[zzyzzx]

I was expecting less wear given the mileage.

 

[tbm3fan]

The one in the upper right is a bit of an outlier I'd say.

 

[Fattylocks]

Noticed

The one in the upper right is a bit of an outlier I'd say.

Noticed that one's a bit odd. Bottom right looks like it might be a little more worn than the rest.

 

[jj51702]

The one in the upper right is a bit of an outlier I'd say.

Care to elaborate? Which characteristics set it apart and what could they be caused by?

 

[jj51702]

Noticed

Noticed that one's a bit odd. Bottom right looks like it might be a little more worn than the rest.

Care to elaborate? Which characteristics set it apart and what could they be caused by?

 

[Fattylocks]

Care to elaborate? Which characteristics set it apart and what could they be caused by?

Center electrode looks to be worn on an angle.

 

[tbm3fan]

Care to elaborate? Which characteristics set it apart and what could they be caused by?

Five base rings have a nice light gray appearance while one looks to be on the black side. One might say slightly cold or rich but still in the range of acceptable to good. Judgment since it isn't in my hand for a good close look.