From looking at the NGK pic chart i *THINK* that engine is OK but might be running a little rich (due to the black soot on the ring).

Pics of the plugs are here:
http://www.mrchan.net/IMG_1308.JPG
http://www.mrchan.net/IMG_1309.JPG

Am I correct?

 

whats your setup. is it stock or modified,is it tuned or not

 

Black soot on the ring appears on almost every plug.

Timing looks good. The plugs look cold, because there are no heat rings on the threads, normally the first 2-3 threads on the plug will discolor, indicating normal heat range.

Are those soot marks on the insulator permanent, or can you wipe it off?

They look pretty good, but I would get a warmer plug, what engine do you have?

 

i have the 4cyl 2.3L accord engine, F23

car is bone stock, a bit over 150K on it.

soot marks on the insulator can be wiped off.

 

The engine is in good shape, a little bit of extra fuel, air filter might be old, but given the mileage, it doesn't look bad at all.

 

i wouldnt worry. just run it

 

yeah its a DD car, any DD car that stays at low rpm will have some black.