Photo of all 6: Close-up, they all look identical. Sorry for the out of focus close-ups. Used a camera phone as my normal camera is out for service. But from the coloring of the plugs - it's a little more sooty around the rim/base that I would expect. These plugs are about 3K miles old. I also suspected I had some oil burning issues. I've sinced switched to GC [0w-30] but seems my oil burning issues may be continuing.
Photo of Cylinder #6's plug:
Picture of Cylinder #5's plug:
Picture of Cylinder #4's plug:
