Why Is My Plug Burning Red?

[88 Turbo Coupe]

I was jetting one of my air colled R's today and after checking my plug it's red. WTF?

[HondaHarry]

that's a new one... what premix oil do you run? and gear oil? how does the fuel look? not rusty is it? take a pic of the plug if you can I guess. HH

[Yamatrike400]

"Normal, but with red coating: The red coating is a result of the additives in lower-quality unleaded fuel and will be visible on the plug's ceramic insulation. The red coating is not an indication of any engine problems."

[Curtis-Tecate3]

The only time my plug was ever red was when I ran octane booster.

Curtis

[userj8670]

yes i had the same problem when i ran high test octane with octane boost in my sx. The performance was nice but my plug didnt like it. I had a thread on here a while back ago. there is a technical name for it but i cant remember.

[userj8670]

here u go:


http://www.3wheelerworldforums.com/showthread.php?t=85053&highlight=spark+plug

[88 Turbo Coupe]

"Normal, but with red coating: The red coating is a result of the additives in lower-quality unleaded fuel and will be visible on the plug's ceramic insulation. The red coating is not an indication of any engine problems."

I was using VP red.