red stuff on spark plugs

[EyeTalk2Trees]

before a had a huge problem and it tookforever to find, turns out my plugs got so carboned up they barely sparked. SO now I change them every few months. This time i noticed they were all the tips and inside insulator was red. I looked like someone had actualy spray painted them red. At first i though it was just seeing things and it was rust, it might be rust but its much brighter than rust. The only thing I can think of is I've been using 104+ octane booster the black bottle(i know it doens't really work, I have a case i got for free from a guy, so i put it in the tank with every fillup).

Has anyone ever heard of this. Now I'm scared, I do have a slow heating problem (on another post) maybe there is a water leak in the chamber. But the car hasn't never ran better and I'm not loosing water that i can tell. even at 15# there isn't any knock, and i'm using 91 octane.

 

[SLOW_85]

The octane booster is causing the redness on the plugs.
Doesn't take long,why it's recommended not to use the stuff. HTH

 

[cool 84]

104+ will do it everytime. My dad's car used to have orange plugs so I tried the 104 and I got them too. Nothing to worry about. You're much better off using xylene much cheaper and much higher octane.