Quote:
Originally Posted by B@fink
The brown ring on the number 3 plug (and to a lesser degree 1 and 2) isn't gas blow by around the ceramic but a corona stain. The air around the spark plug is breaking down when charged when the plugs are firing (very high voltages from the ignition system) which statically attract oil vapours in the air to the ceramic.
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Consider yourselves edjumacated guys! 
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2002 Final Edition S8. Ebony black with Silver Grey leather and myrtle wood trim. Current mods: solar sun roof, 20mm rear spacers, 15 mm on front, red brembo callipers, 6k headlights, rear view camera, engine remap, alloy dash dial rings, alloy navi rings, tt/phaeton pedal upgrade, (and custom matching foot rest) dension ipod interface & parrot hands free kit (both fully hidden), av input, tv in motion switched thro' PF switch in blanking plug right of steering column, Audi 'quattro' sill covers, repositioned centre console switches, radio clock, .
Planned mods: auto-dimming rear view mirror, dash cam (as steamship's), fit the ski hatch, refit philips drl's (or maybe not - nope, definitely not - horrible botch!).
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