Originally Posted by aussiem3
I should have also mentioned, that I use Shell V-Power too. I am still surprised with the amount of carbon build up on the plugs. If the fuel clean as they claim, how's there carbon on the plug tips. My exhaust tips are not bad. They are black and the build up is not gunky.
My only guess would be you're running a bit on the rich side? Lots of stop-and-go situations? Short distances when cold? O2 sensors starting to age? I'll put up a photo of mine, done at 22k or so, they didn't look that bad.