hmm dark red spark plug tips

[ffemtcurrence]

i pulled my spark plugs out last night and the ends were coated in a almost darker than blood red color.....what does that mean...i know its not oil cause that would be black...any ideas

 

[1993MTXSHO]

look like the 3rd one down on the left?

http://www.classictruckshop.com/clubs/earlyburbs/projects/spark/plugs.htm

 

[ffemtcurrence]

exactly like that thanks a bunch