changed my plugs yesterday, question about what i saw

[.Mad Hatter.]

hey guys, i changed my plugs yesterday (ps, bosch isnt making the f6dtc anymore, they switched to the fr6dc, we shall see how they work out.)

anyway, cylinders 1, 2, and 3 had the usual little bit of oil on the plugs, which were somewhat loose. cylinder 4 had no wet oil on the plug, only a dried brown substance, i assume oil. the best way to describe it i guess would be to say that it looked like dried coffee.

so, experts, what is the deal with this 4th cylinder? no misfires, no visible, significant, or consistent lose in power or boost, no codes, etc.

[GetBoosted84]

brown is ok... white = lean and black = rich so you are good. Oil is probably just a leaky spark plug gasket under the valve cover. No worries. It's a quick fix.