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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PF late '97 D2 2.8 Aluminium Silver. Solar roof, Full Heated Leather, Double Glazing, 17" wheels, Sports Steering Wheel, Cruise, Blinds, Bose sound.
Fiat Tipo diseasel econobox with all the buttons and none of the soul that now does all the heavy lifting.
Ford Capri Laser: noisy, slow, thirsty, bouncy, no buttons but it always sounds like it’s REALLY trying and I can’t help but chuckle when it parps and boings along. And people of a certain age stare at it with a wistful look in their eyes that clearly says…I had one of them. And I sold it because of the kids 
Last edited by B@fink; 4th June 2014 at 05:21 AM.
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