Reading Spark Plugs

matthon said
They are not wet with gas, no odor of gas at all. It's oil.
Rich or wet would mean gas on them?

Car was sitting overnight when I pulled them, if that matters.
I have a set of 600s, but I thought those would be too much carb.
Yes, it has a TR.

The overfueling is probably washing the oil off the cylinder walls and collecting on the plugs.
Your original description of the problem says it doesn't use oil, so how else could it get there?