Mismatched plugs - ever seen this before

Part of me actually wonders if the heat range is dialed up one range over the other on the drivers side since more heat build up occurs on bank 2. There may be more to it than a contractual thing between NGK and Denso.

 

Not sure, but I know a guy that recently won some tires in a raffle. He won't be needing them. So you should take his

 

Thanks for the replies. Really interesting.

And yes, I know 10 years on factory plugs. I came ready for the frosty chill I would feel from the forum. But my curiosity outweighed my anxiety.

 

I don't really know what it means that "this is a goof", but my wife calls me that pretty often, so no apologies needed

 

From time to time, people post some dubious stuff here.

Goof, as I used it, was meant to convey my opinion you weren’t serious hence my apology if I was wrong.

Welcome BTW.

 

Nissan did this to one of my Sentras

 

naw both plugs are identical specs. What makes you think the driver side heats up more than passenger? I know both rear cylinders have 1* less of timing across the board due to extra heat, but side to side differences naw.

 

1st gens are like this too, been that way for a long time (3 Denso 3 NGK) from factory.

 

Just what you said right there. Their idea of cooling down the rearmost cylinders is to pull timing and add extra fuel to cool them down.

If they are identical in heat range and specs and just different brands then it was definitely a contractual exclusive thing.

 

Legit question for sure. One I had back when I did my first plug change years ago. But search is your friend on this forum. Literally so much information to sift through. Welcome!

 

yeah no side to side differences as far as heat reduction, but front to back yes. The plugs like stated are a contractual thing and allows one to see if plugs are from the factory easily.

 

Sure, I have factory plugs on my 98 Ranger. Runs great. Years shouldn't mater as much as mileage.

 

Makes sense. And with this we can all go home now because the question on this thread has been answered. Lol.

/ Thread

 

Had a misfire on my 99 when finally found out after my times on code checks it was plugs they were mismatched ? Some one did not do there job it's common lol if can do your own repairs do it u will sleep better at night lol

 

Most I've ever seen was 7-9

 

Normal factory first time plugs.