need help with spark plug analysis

[jellyfish]

hi guys, i`ve just came back from my servicing, 20k oil change, on redline 10w-30 engine oil, and i decided to replace the sparkies to those iridium ones, that last longer(100k i heard) but i intend to change it out at 60k. oh ya my engine is stock F20C block .

here is the pics, am i running rich or lean, it seems like having some corrosion prob and carbon build up issues. hmm

how to prevent the build up of carbon? and is there anyway to tune the fueling?



the 4 sparkies, notice the rusty area






looks like carbon build up to me


theres a white spot there, seems like the sparks hit that spot onli


looks like rust too, any way to prevent it?

[TPAUL11]

Ur pulgs look normal,its just worn and due for change which u did.

[UltraBear]

these plugs have aged and worn off.... but certainly u're not running lean neither rich... the built up carbon is the result of poor sparks produced...

[jellyfish]

hmmm, its platinium plugs, kah motor say they can last 100k, if thats the case i fear more liao

[Silver]

Plugs condition looks ok... Not lean nor rich...