I use this as a guideline;
Diagnosing Spark Plug Health
To me it looks like it's a little on the hot side. Maybe try BPR8ES.
The plugs in the original post; Were they BPR7ES' too? If so, how long were they in for? I'm asking because copper have to be changed more often then the irridiums (every5K to 6K miles).
Can you post a log too?
