Originally Posted by SICKQK
Have you ever used a bottle of Octane Boost? It makes the plugs look like that....doesn't hurt them just turns them reddish brown looking, like rust.
no i use Ethanol, additive and was using Ethanol free gas for awhile, sometimes i use 93 octane but usually 87. Never Octane booster though. the plug around the white part had some redish around it as well.