so i had a surprise a week ago. i bought some new ngk plugs went home and went to go install them and noticed something. one box was in japanese and the plug was different. almost like a different material. but their but were bur9eq. here are the pics
us version

japanese version

 

no Hmmn wierd that they're both trailing maybe just a factory output was messed or some odd metal..

 

I've got a box sitting here of about 150 or so used plugs. 80% of them 9s, some platinums, some 7s, some 10s.

About half are silver, and half are gold. Although, I can't find a gold colored 10.

Edit: Just went and looked at some new plugs: B10EGVs are silver, B10EVs are gold, (says Gold Palladium on the box), and the super-duper R6725-105s are silver.

 

yeah that happens alot I guess I see this quite a bit at work

 

so why is it gold instead of silver. is it the same difference as going from silver to plantium?

 

wtf?

 

The "gold" looks like a gold cadmium plating.
If it is, it's just for corrosion resistance.
It doesn't really affect the performance of the spark plug.


-Ted

 

I just got some like that today.