is this is a good spark plug????????

[rocket0000]

guys i was wondering if my GM sparks in this pics are good. i just pulled them out after 6000 km and i did replace them with ngk . i just pulled 1 yesterday after they done 1000 km look the same. i can see a lot of black deposits on the jay ring base is this is normal?????

thank you.

[soop]

Looks pretty good to me.
If you want give them a wash in some clean petrol. Then bang them back in.

[rocket0000]

thanks for reply mate but am just a bit worried bout the black shit on the base?????

[soop]

Its carbon.
Thats happens to the petrol when i goes bang

[rocket0000]

thanks mate.....