I've purchased NGK copper plugs and was wondering what type of condition this spark plug is in? I've heard that spark plugs can often tell the condition of an engine. The VQ30DE has 115k and I bought the car with zero service records, and the Infiniti dealership told me the previous owner (who lived in Montgomery, GA) had no 60k service done... at least at any Infiniti dealership, so these might be the original spark plugs. Thanks!

http://s87266458.onlinehome.us/gallery/i30/IMG_0898_001

 

Isn't a blue-ish gray normal?
If the plug were white-ish gray then the engine is running a little hotter than normal.

*shrug*
Pick up a Hayne's Manual, there are pics of different plug sicknesses to compare.

(Nice camera, btw...)

 

http://www.ngksparkplugs.com/techinf...q/faqread2.asp

 

That plug looks good.

 

looks really good. you my son have a platinium plug there, Cherish IT!