G'day Norm,
Looks like that plug is running too cold - i.e. the centre electrode isn't getting hot enough to burn off the carbon deposits. As it should do.
This can be due to two things; most likely is a manufacturing fault in the plug - the other is that that plug is the wrong 'heat range' for that engine.
As you'd know, if it was just that one cylinder is burning oil, the complete end of the plug would be covered in deposits.
Cheers,
Gadge
"ODK Mods can explain it to you, but they can't understand it for you..."
"Crazy can be medicated, ignorance can be educated - but there is no cure for stupid..."
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