Read my plugs

These plugs have about 1k miles on them. I changed the plugs when I got the car about 2 months ago. The original plugs had an orange tint to them, so I put new ones in, and now they have an orange color also ! I'm not running any octane booster, just B.P. or Sunoco gas 89/ 93 octane. Anyone seen this color before ?? The car doesn't burn oil, no loss of antifreeze, actually runs great ! Ideas ? 1st pix #1 cylinder, 2nd, pix #8 cylinder

 

I would get an air fuel meter....

 

I've only seen that one time. I was running way too hot Champion plugs in my '53 Buick right after I first bought it and they all turned red. Your problem may be unrelated, but it may be worth it to double check your heat range. Sean's advice to get a wideband is good, however, as it's pretty much the only way for an average guy to really know where the AFR is with modern gas.

 

It's from additives in the unleaded gas.

Those look good.

 

Agree with TrunkMonkey; although I usually saw that on plugs as a result of gas from California, and that was in the mid 90's... No heat discoloration, no detonation 'pinging', Clean other than the 'orange tint'. Plug one DOES seem a bit white on the center electrode, but that could be the photo, as it seems more like a shadow. What style of ignition system are you running?

 

I don't have access to a a/few ratio gauge, wish I did. They are the stock ac Delco plugs and I'm running a stock points ignition. Thanks for input everyone. I think I'm going to finish this tank of gas, swap out a few plugs and try gas from a different source, and see what they look like.

 

Thanks all, after doing a google search, I believe it from an additive also, just wonder why my plugs in my truck have never looked like that ? Then again I only run 87 octane in it. They just looked REALLY orange , lol .